DEV Community: Guna Ramesh

Looping in JS

Guna Ramesh — Fri, 26 Jun 2026 07:20:43 +0000

What is Looping? And why do we use it?
Loops are used to execute a block of code repeatedly without writing the same code multiple times. They help reduce code repetition and make programs more efficient.
example:
without looping:

console.log(1);
console.log(2);
console.log(3);
console.log(4);
console.log(5);

with looping:
for loop
Syntax

for(initialization; condition; increment){
    // code
}

for(let i = 1; i <= 5; i++){
    console.log(i);
}

This also gives me the same output, but the code is reduced to be smart.

output is:
1
2
3
4
5

Print Numbers from 5 to 1

for(let i = 5; i >= 1; i--){
    console.log(i);
}

Explanation
i is initialized with 5.
The loop runs while i >= 1.
console.log(i) prints the current value of i.
i-- decreases the value by 1 after each iteration.
When i becomes 0, the condition 0 >= 1 is false, so the loop stops.

Output
5
4
3
2
1

Expected Output

1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz

program

for (let a = 1; a <= 10; a++) {
    if (a % 3 == 0) {
        console.log("Fizz");
    }
    else if (a % 5 == 0) {
        console.log("Buzz");
    }
    else {
        console.log(a);
    }
}

Explanation
a is initialized with 1.
The loop runs while a <= 10.
If a is divisible by 3, it prints "Fizz".
Else if a is divisible by 5, it prints "Buzz".
Otherwise, it prints the number.
After each iteration, a++ increases the value by 1.
The loop stops when a becomes 11 because the condition 11 <= 10 is false.

output
1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz

Print Odd Numbers Using continue

Expected Output
1
3
5
7
9

Program

for (let i = 1; i <= 10; i++) {
    if (i % 2 == 0) {
        continue;
    }
    console.log(i);
}

Explanation
i is initialized with 1.
The loop runs while i <= 10.
If i is an even number, continue skips the current iteration.
Only odd numbers reach console.log(i).
After each iteration, i++ increases the value by 1.
The loop stops when i becomes 11 because the condition 11 <= 10 is false.

Output

Expected Output
1
2
3
4
5

program

for (let i = 1; i <= 10; i++) {
    if (i == 6) {
        break;
    }
    console.log(i);
}

Explanation
i is initialized with 1.
The loop runs while i <= 10.
When i becomes 6, the break statement stops the loop immediately.
Since the loop stops before console.log(i), 6 is not printed.
The loop ends without checking the remaining values.
Output

Expected Output
1
3
program

for (let i = 1; i <= 5; i++) {
    if (i === 2) {
        continue;
    }

    if (i === 4) {
        break;
    }

    console.log(i);
}

Explanation
i is initialized with 1.
The loop runs while i <= 5.
When i becomes 2, continue skips the current iteration, so 2 is not printed.
When i becomes 4, break stops the loop immediately, so 4 and the remaining values are not printed.
Only 1 and 3 are printed.

Output
1
3

Part -2 Control Flow Statement

Guna Ramesh — Thu, 25 Jun 2026 04:58:45 +0000

why we use break in Switch cases?
If the break statement is not used, JavaScript continues executing the next cases even when a match is found. This behavior is called fall-through.

example
let day = 1;
switch (day) {
case 1:
console.log("sunday")

        case 2:
            console.log("monday")

        case 3:
            console.log("tuesday")
        default:
            console.log("invalid day")

output
sunday
monday
tuesday
invalid day
Default
The default block is optional in a switch statement. It is used to execute code when none of the cases match the given value. Without a default block, no code runs if there is no matching case.

Ternary Operator
A ternary operator is a shorthand way of writing a simple if...else statement in JavaScript.
It is called ternary because it uses 3 parts:

condition ? valueIfTrue : valueIfFalse

program

let age = 20;
let result = age >= 18 ? "Adult" : "Minor";

console.log(result);

output:
Adult

JavaScript Control Flow Statements

Guna Ramesh — Wed, 24 Jun 2026 13:27:25 +0000

JavaScript Control Flow Statements

Control flow statements help us decide which code should run based on conditions.

if Statement

The if statement executes a block of code only when the condition is true.

let a = 10;

if (a > 5) {
    console.log("a is greater than 5");
}

Explanation

a is assigned the value 10.
The condition a > 5 is checked.
Since 10 is greater than 5, the condition is true.
Therefore, the code inside the if block is executed.

Output:

a is greater than 5

if Statement with a False Condition

let a = 10;

if (a < 5) {
    console.log("a is greater");
}

Explanation

a is assigned the value 10.
The condition a < 5 is checked.
Since 10 is not less than 5, the condition is false.
The code inside the if block does not execute.
No output is displayed.

if...else Statement

The else block is used when the if condition is false.

let a = 10;

if (a < 5) {
    console.log("a is smaller");
} else {
    console.log("a is greater");
}

Explanation

a is assigned the value 10.
The condition a < 5 is checked.
Since the condition is false, the if block is skipped.
The else block is executed.

Output:

a is greater

Conclusion

Use if when you want code to run only if a condition is true.
Use if...else when you want one block to run if the condition is true and another block to run if the condition is false.
Control flow statements make programs intelligent by allowing them to make decisions.

JavaScript else if Statement

The else if statement is used when we need to check multiple conditions.

let mark = 90;

if (mark >= 90) {
    console.log("excellent");
}
else if (mark >= 70) {
    console.log("very good");
}
else if (mark >= 50) {
    console.log("good");
}
else {
    console.log("improve");
}

Explanation

mark is assigned the value 90.
The first condition mark >= 90 is checked.
Since 90 is equal to 90, the condition is true.
The code inside the first if block is executed.
Once a condition becomes true, the remaining else if conditions are skipped.

Output:

excellent

How else if Works

The program checks conditions from top to bottom.

Check mark >= 90
If false, check mark >= 70
If false, check mark >= 50
If all conditions are false, execute the else block

Example 2

let mark = 75;

if (mark >= 90) {
    console.log("excellent");
}
else if (mark >= 70) {
    console.log("very good");
}
else if (mark >= 50) {
    console.log("good");
}
else {
    console.log("improve");
}

Explanation

75 >= 90 → false
75 >= 70 → true
The second block executes.
Remaining conditions are skipped.

Output:

very good

Example 3

let mark = 40;

if (mark >= 90) {
    console.log("excellent");
}
else if (mark >= 70) {
    console.log("very good");
}
else if (mark >= 50) {
    console.log("good");
}
else {
    console.log("improve");
}

Explanation

40 >= 90 → false
40 >= 70 → false
40 >= 50 → false
All conditions are false.
The else block executes.

Output:

improve

Conclusion

Use else if when you need to check multiple conditions.
Conditions are checked from top to bottom.
As soon as one condition becomes true, its block is executed.
The remaining conditions are ignored.
If no condition is true, the else block is executed.

switch statement

let day = 2;
        switch (day) {
            case 1:
                console.log("sunday")
                break;
            case 2:
                console.log("monday")
                break;
            case 3:
                console.log("tuesday")
                break;
            case 4:
                console.log("wednesday")
                break;
            case 5:
                console.log("thursday")
                break;
            case 6:
                console.log("friday")
                break;
            case 7:
                console.log("saturday")
                break;
            default:
                console.log("invalid")

        }

Explanation
day is assigned the value 2.
The switch statement checks the value of day.
It compares day with each case.
case 2 matches the value.
The code inside case 2 is executed.
The break statement stops the execution of the switch block.

Output:

monday

Function

Guna Ramesh — Mon, 15 Jun 2026 06:16:01 +0000

In JavaScript, a function is a block of code designed to perform a specific task. It runs when it is called (invoked).
Function Declaration
A Function Declaration is a way of creating a function in JavaScript using the function keyword followed by the function name. It defines a reusable block of code that performs a specific task whenever the function is called.

code
function name(){
console.log("Gunalan")
}
name()
output
Gunalan
How to receive and give the arguments in function?
function name(name1,name2){
console.log("Gunalan")
console.log(name1,name2)
}
name("guna","ramesh")
I created a function named name.
The function has two parameters, name1 and name2.
Parameters are used to receive values when the function is called.
When I call the function using name("guna", "ramesh"), the values "guna" and "ramesh" are called arguments.
The first argument ("guna") is assigned to name1.
The second argument ("ramesh") is assigned to name2.
Then the function executes its code and prints:

Gunalan
guna ramesh

example 2 add two values in function
function name(val1,val2){
console.log("Gunalan")
console.log(val1+val2)
}
name(90,87)
output
Gunalan
177
when use return in function
Use return when you want a function to send a value back to where it was called.
function name(val1,val2){
console.log("Gunalan")
console.log(val1+val2)
return val1-val2
}
let result=name(90,87)
console.log(result)
output
Gunalan
177
3
Function Expression
Function Expression is a syntax (how you define a function as a value), while Storing in a variable is an action (how you assign that value).
const name=function(){
console.log("gunalan")
}
name()
output
gunalan

if you call before function expression its show error because its stored one variable.So dont call previously.
name()
const name=function(){
console.log("gunalan")
}
output
ReferenceError: Cannot access 'name' before initialization

Python Train Task 1

Guna Ramesh — Thu, 28 May 2026 08:52:51 +0000

Task1:
Two trains are travelling one place to another place.
Total no of station is 300.
The 1st train will stop every 3rd station and
2nd train will stop every 5th station.
I need a following output :
if 1st train stops in any stations.print Train 1 is stopped
if 2nd train stops in any stations.print Train 2 is stopped
And both trains are stops in same stations print Both Trains are stopped.

program:
station=1
totalstation=300
while totalstation>=station:
    if station%3==0 and station%5==0:
        print(station,"Both Trains are stopped.")
    elif station%3==0:
        print(station,"Train 1 is stopped.")
    elif station%5==0:
        print(station,"Train 2 is stopped.")
    station=station+1

output:
3 Train 1 is stopped.
5 Train 2 is stopped.
6 Train 1 is stopped.
9 Train 1 is stopped.
10 Train 2 is stopped.
12 Train 1 is stopped.
15 Both Trains are stopped.
18 Train 1 is stopped.
20 Train 2 is stopped.
21 Train 1 is stopped.
24 Train 1 is stopped.
25 Train 2 is stopped.
27 Train 1 is stopped.
30 Both Trains are stopped.
33 Train 1 is stopped.
35 Train 2 is stopped.
36 Train 1 is stopped.
39 Train 1 is stopped.
40 Train 2 is stopped.
42 Train 1 is stopped.
45 Both Trains are stopped.
48 Train 1 is stopped.
50 Train 2 is stopped.
51 Train 1 is stopped.
54 Train 1 is stopped.
55 Train 2 is stopped.
57 Train 1 is stopped.
60 Both Trains are stopped.
63 Train 1 is stopped.
65 Train 2 is stopped.
66 Train 1 is stopped.
69 Train 1 is stopped.
70 Train 2 is stopped.
72 Train 1 is stopped.
75 Both Trains are stopped.
78 Train 1 is stopped.
80 Train 2 is stopped.
81 Train 1 is stopped.
84 Train 1 is stopped.
85 Train 2 is stopped.
87 Train 1 is stopped.
90 Both Trains are stopped.
93 Train 1 is stopped.
95 Train 2 is stopped.
96 Train 1 is stopped.
99 Train 1 is stopped.
100 Train 2 is stopped.
102 Train 1 is stopped.
105 Both Trains are stopped.
108 Train 1 is stopped.
110 Train 2 is stopped.
111 Train 1 is stopped.
114 Train 1 is stopped.
115 Train 2 is stopped.
117 Train 1 is stopped.
120 Both Trains are stopped.
123 Train 1 is stopped.
125 Train 2 is stopped.
126 Train 1 is stopped.
129 Train 1 is stopped.
130 Train 2 is stopped.
132 Train 1 is stopped.
135 Both Trains are stopped.
138 Train 1 is stopped.
140 Train 2 is stopped.
141 Train 1 is stopped.
144 Train 1 is stopped.
145 Train 2 is stopped.
147 Train 1 is stopped.
150 Both Trains are stopped.
153 Train 1 is stopped.
155 Train 2 is stopped.
156 Train 1 is stopped.
159 Train 1 is stopped.
160 Train 2 is stopped.
162 Train 1 is stopped.
165 Both Trains are stopped.
168 Train 1 is stopped.
170 Train 2 is stopped.
171 Train 1 is stopped.
174 Train 1 is stopped.
175 Train 2 is stopped.
177 Train 1 is stopped.
180 Both Trains are stopped.
183 Train 1 is stopped.
185 Train 2 is stopped.
186 Train 1 is stopped.
189 Train 1 is stopped.
190 Train 2 is stopped.
192 Train 1 is stopped.
195 Both Trains are stopped.
198 Train 1 is stopped.
200 Train 2 is stopped.
201 Train 1 is stopped.
204 Train 1 is stopped.
205 Train 2 is stopped.
207 Train 1 is stopped.
210 Both Trains are stopped.
213 Train 1 is stopped.
215 Train 2 is stopped.
216 Train 1 is stopped.
219 Train 1 is stopped.
220 Train 2 is stopped.
222 Train 1 is stopped.
225 Both Trains are stopped.
228 Train 1 is stopped.
230 Train 2 is stopped.
231 Train 1 is stopped.
234 Train 1 is stopped.
235 Train 2 is stopped.
237 Train 1 is stopped.
240 Both Trains are stopped.
243 Train 1 is stopped.
245 Train 2 is stopped.
246 Train 1 is stopped.
249 Train 1 is stopped.
250 Train 2 is stopped.
252 Train 1 is stopped.
255 Both Trains are stopped.
258 Train 1 is stopped.
260 Train 2 is stopped.
261 Train 1 is stopped.
264 Train 1 is stopped.
265 Train 2 is stopped.
267 Train 1 is stopped.
270 Both Trains are stopped.
273 Train 1 is stopped.
275 Train 2 is stopped.
276 Train 1 is stopped.
279 Train 1 is stopped.
280 Train 2 is stopped.
282 Train 1 is stopped.
285 Both Trains are stopped.
288 Train 1 is stopped.
290 Train 2 is stopped.
291 Train 1 is stopped.
294 Train 1 is stopped.
295 Train 2 is stopped.
297 Train 1 is stopped.
300 Both Trains are stopped.

What is Sep-Seperate in Python?

Guna Ramesh — Wed, 27 May 2026 06:12:42 +0000

sep **stands for separator
**sep works only when there are 2 or more values.
Its cant work if any one value is available.

print("Gunalan", sep="*")
output
Gunalan

If you didn't use **sep **to make a **space **By default Python uses space, so we use sep to change it.

program
print("Gunalan","Ramesh")
output
Gunalan Ramesh

So we need any thing instead of Space use sep for change.
Example:

program
print("Gunalan","Ramesh",sep="*")
output
Gunalan*Ramesh
print("Gunalan","Ramesh",sep=".")
output
Gunalan.Ramesh
print("Gunalan","Ramesh",sep="with")
output
GunalanwithRamesh
But you did \n 
output
Gunalan
Ramesh

Reason is \n is used for push next value to next line.
Symbol Meaning
\n next line
\t tab space
\ backslash
\' single quote
\" double quote
They are special commands inside .

JavaScript Scenario Questions (Variables, Operators, Conditional Statements)

Guna Ramesh — Tue, 26 May 2026 14:14:33 +0000

1.You are building a login system. Store username and password in variables and check whether both are filled.

Program
let username="gunalan";
let password="ramesh"
if(username!==""&&password!==""){
    console.log("filled")
}
else{
    console.log("Not filled")
}

output
filled

Explanation:
I created two variables named username and password using the let keyword and assigned values to them.
Then, I used an if condition to check whether both variables are filled or not.
"" means empty
!== "" means not empty (filled)
&& means both conditions must be true
So, the condition checks if both username and password are not empty.
If both are filled, it prints "filled".
Otherwise, it prints "Not filled".
So the output is "filled".

2.Create variables to store a product's name, price, and stock. Print a message like:
"iPhone costs ₹60000 and only 5 left in stock"

program
       let name="iPhone"
       let price=60000
       let stock=5
       console.log(name,"costs","₹"+price,"and only",stock,"left in stock")

output
       "iPhone costs ₹60000 and only 5 left in stock"

Explanation:

I created three variables using let: name, price, and stock, and assigned values to them.

Then, I used console.log() to print a message using those variables.

The output will be:
"iPhone costs ₹ 60000 and only 5 left in stock"

name → product name
price → product price
stock → available quantity

console.log() is used to display the message by combining text and variables.

3.Store a student's marks in 3 subjects and calculate total.

let tamil=98
let english=100
let maths=100
let total=tamil+english+maths
console.log(total)

output
298

explanation
I created three variables: tamil, english, and maths, and assigned marks to them.

Then, I calculated the total using:
let total = tamil + english + maths;

Finally, I printed the total using console.log().

4.Swap two numbers without using a third variable.

program
let a=10;
let b=20
    a=a+b 
    b=a-b 
    a=a-b
    console.log(a,b)

output
20 10

Explanation
Add both → a = a + b a=10+20=30
Get original a → b = a - b b=a-b =>30-20=10
Get original b → a = a - b a=a-b =>30-10=20

5.Create a variable that stores whether a user is logged in or not and show a welcome message.

program
  let loggedin=true
  if(loggedin){
      console.log("Your'e welcome!")
  }
  else{
      console.log("login first")
  }

output
Your'e welcome!

Some Task In Operators in Javascript

Guna Ramesh — Tue, 26 May 2026 03:48:05 +0000

Operators Task

Task 1
let a = 15;
let b = 4;

Find:

a + b
a % b

program:
    let a =15;
    let b=4;
    console.log (a+b);
    console.log (a%b);

output:
    19
    3

Task 2
let x = 10;
x += 20;

Final value?

program:
    let x=10;
    x=x+=20; //x=x+20//
    console.log(x)

output:
    30

Task 3

Output guess:

console.log(5 == "5");
console.log(5 === "5");

program:
    console.log(5 == "5");
    console.log(5 === "5");

output: 
    true
    false

explanation:
== is only check a value.
=== is check a value and datatype if anyone is different it said false.
Task 4 (Real-life)
let age = 17;

Check:

age >= 18 → print true/false

program:
    age=17;
    if(age>=18){
        console.log("true")
    }
    else{
        console.log("false")
    }

output:
    false

explanation:

The variable age is initialized with the value 17
The if statement checks whether the condition age >= 18 is true
Since 17 is less than 18, the condition becomes false
When the condition is false, the else block is executed
Therefore, the program prints "false"
Output:
false
Task 5: Even or Odd (Using %)
let num = 7;

Check:

If remainder is 0 → even
Else → odd

Print result

program:
let num = 7;
if (num%2==0){
console.log("even")
}
else{
console.log("odd")
}

output:
odd

🔍 Explanation

 The variable num is assigned the value 7

 The condition num % 2 === 0 checks whether the number is divisible by 2

 If the remainder is 0, the number is even

 If the remainder is not 0, the number is odd

 Here, 7 % 2 = 1, so the condition is false

 Therefore, the else block executes

Output
odd

Key Point

% (modulus) operator is used to find the remainder
Even numbers → remainder 0
Odd numbers → remainder not 0
Task 5: Logical Operators
let age = 22;
let hasID = true;

Check:

age > 18 AND hasID → ?
age < 18 OR hasID → ?

Print both outputs

program:
    let age = 22;
    let hasID = true;
    console.log(age>18 && hasID)
    console.log(age<13||hasID)
output:
    true
    true

what happens?
The variable age is assigned the value 22
The variable hasID is assigned the value true
Condition 1: age > 18 && hasID

age > 18 → 22 > 18 → true
hasID → true

Using AND (&&):
Both conditions must be true

Result:
true && true → true

Condition 2: age < 18 || hasID

age < 18 → 22 < 18 → false
hasID → true

Using OR (||):
At least one condition must be true

Result:
false || true → true

Output
true
true

Key Points

 && (AND) → both conditions must be true
 || (OR) → any one condition is enough
 Logical operators are used for decision making

Python Tasks

Guna Ramesh — Tue, 26 May 2026 03:43:25 +0000

The following programs clearly explain the concept of indentation and highlight common mistakes we usually make.
1.expected output is "1 1 1 1 1"

program:
count = 1
while count<=5:
print(1, end=' ') #print(1, end='\n')
count=count+1

output:
1 1 1 1 1

What happens in this program?

Initially, the variable count is assigned the value 1

The while loop checks whether count is less than or equal to 5

If the condition is true, the loop executes

Inside the loop, the value 1 is printed followed by a space

After printing, the value of count is increased by 1

Now count becomes 2, and the loop runs again

This process continues until count becomes greater than 5

When count becomes 6, the condition becomes false, and the loop stops

Output
1 1 1 1 1

Additional Note

If you use:

print(1, end='\n')

The output will be:

Program 1
Expected Output
2 4 6 8 10 6 12
Program
count = 1
while count <= 5:
print(count * 2, end=' ')
count = count + 1

print(count, end=' ')
print(count * 2)
Explanation

Initially, count is assigned the value 1

The loop runs while count <= 5

Inside the loop, count * 2 is printed with a space

After each iteration, count is increased by 1

When the loop ends, count becomes 6

After the loop:

print(count, end=' ') prints 6
print(count * 2) prints 12
Output

2 4 6 8 10 6 12

Program 2
Expected Output
2 4 6 8 10 6
12
Program
count = 1
while count <= 5:
print(count * 2, end=' ')
count = count + 1

print(count)
print(count * 2)
Explanation

The loop works the same as in Program 1

After the loop ends, count = 6

print(count) prints 6 and moves to the next line

print(count * 2) prints 12 on a new line

Output
2 4 6 8 10 6
12
Important Concept: Indentation

If indentation is not handled correctly, the output will be unexpected.

Wrong Program
count = 1
while count <= 5:
print(count * 2, end=' ')
count = count + 1
print(count)
print(count * 2)
What happens?

The last two print statements are inside the loop because of indentation

So they execute in every iteration

This produces repeated and mixed output

Output
2 2
4
4 3
6
6 4
8
8 5
10
10 6
12
Final Key Points

Indentation decides whether code is inside or outside the loop
end=' ' prints in the same line
end='\n' prints in the next line
print() moves to the next line
Always align indentation carefully

Python

Guna Ramesh — Mon, 25 May 2026 13:53:49 +0000

1.Excepted output:
10 8 6 4 2
program:
a=10
while a>=1:
print(a,end=" ")
a=a-2
output:
10 8 6 4 2

What happens in this program?

Initially, the value of a is set to 10. The while loop checks whether a is greater than or equal to 1.

Since the condition is true, the loop starts executing. Inside the loop, the current value of a is printed, followed by a space.

After printing, the value of a is decreased by 2 (a = a - 2), and the updated value is stored back in the same variable.

This process continues:

First iteration → a = 10
Second iteration → a = 8
Third iteration → a = 6
Fourth iteration → a = 4
Fifth iteration → a = 2

When a becomes 0, the condition a >= 1 becomes false, and the loop stops.

Output:
10 8 6 4 2

This task for you
15 12 9 6 3

Javascript Variables.

Guna Ramesh — Sun, 24 May 2026 15:52:51 +0000

Task 1:Create Variables

Create 3 variables:

Your name
Your age
Your city

Use let for age, const for name
program:
let name="gunalan"
let age="23"
const city="pattukkottai"
console.log(name)
console.log(age)
console.log(city)

output:
gunalan
23

pattukkottai

Task 2: Update Value

let score = 10;
Change it to 50 and print it using:
console.log(score);

program:
let score=10;
score=50;
console.log(score)

output:

50

Task 3: Const Error Check

const country = "India";
Try to change it to "USA"
What happens? (observe error)

program:
const country="india";
country="usa";
console.log(country);

output:

TypeError: Assignment to constant variable.

Understanding Concepts

Task 4: Identify Output

program:
var x = 10;
var x = 20;
console.log(x);

output:

20

Task 5: Fix Error

let y = 30;
let y = 40;

Fix this code without error

program:
let y=30;
y=40;
console.log(y)

output:

40

Task 6: Scope Test
{
let a = 100;
}
console.log(a);

Will it work or error? Why?

program:
{
let a = 100;
}
console.log(a);

output:
a is not defined . variable is inside a block but the print statement is outside
so couldn't print the output because let is a block-scope, if you did the print statement inside the

block it is printed.

Level 3: Real-Life Task (Your Project Style)
Task 7: Shopping Cart

Create variables:

const shopName = "RuralCart";
let items = 0;
let price = 100;

Do this:

Add 3 items → update items
Increase price → price = price + 50
Print all values

program:
const shopName = "RuralCart";
let items = 0;
let price = 100;
items=items+3;
price=price+50;
console.log(shopname)
console.log(items);
console.log(price);

output:
RuralCart
3

150

Bonus Challenge

Task 8: Combine Everything

Write a program:

productName
productPrice
quantity

Calculate total:

total = productPrice * quantity;

Print:

Product: Rice
Total Price: 500

program 1:

let productName="Rice";
let productPrice=50;
let quantity=10;
total=productPrice*quantity;
console.log(total)

output:
500

program 2:
let productName="Rice";
let productPrice=50;
let quantity=10;
console.log(productPrice*quantity)

output:

500

Task 9: String + Variable

Create:

let name = "Guna";
let age = 23;

Print like this:

My name is Guna and I am 23 years old

program:
let name = "Guna";
let age = 23;
console.log("My name is "+name+" and I am "+age+" years old")

output:

**My name is Guna and I am 23 years old**

Task 10: Total Price (Clean Output)
let product = "Sugar";
let price = 40;
let qty = 5;

expect Output:

Product: Sugar
Total: 200

program:
let product = "Sugar";
let price = 40;
let qty = 5;
let total=price*qty
console.log("Product:"+product)
console.log("Total:"+total)
output:
Product: Sugar

Total: 200

Python progarming to Print the output in decending order using while loop

Guna Ramesh — Sun, 24 May 2026 07:47:20 +0000

Expected Output is 5 4 3 2 1
Print the Program using Python
count=1
price=5
while count<=5:
print(price,end=' ')
price=price-1
count=count+1

What happens here? Step 1: Create a variable named count and assign the value 1.

Step 2:
Create a variable named price and assign the value 5.

Step 3 (Condition):
The loop runs as long as the value of count is less than or equal to 5.
If count becomes greater than 5, the loop stops.

How the loop works
First, the loop checks the value of count. Initially, it is 1.

The condition count <= 5 is true, so the loop starts.

It prints the value of price and adds a space using end=' '.

Then:

count is increased by 1

price is decreased by 1

Now:

count = 2

price = 4

Again, the condition is checked. Since 2 <= 5, it is still true.

This process continues until count becomes 6. At that point, the condition becomes false, and the loop stops.

Output
5 4 3 2 1
Why is the output horizontal instead of vertical?
Normally, print() moves to the next line after printing.

But here we use:

end=' '
This means:

After printing, a space is added instead of a new line.

So the cursor stays on the same line.

Different end examples
end=' ' → 5 4 3 2 1

end='.' → 5.4.3.2.1.

end='' → 54321