Some Task In Operators in Javascript

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