My Java Full Stack Journey Learning in JavaScript

Today Second day class in JavaScript. I shared the topics, What I learn Today.

Operators:
In programming and logic, an operator is a symbol or keyword that performs an action on one or more values (called operands).

Types of Operators:
.Arithmetic Operators
.Assignment Operators
.Comparison Operators
.Logical Operators
.String Operators
.Type Operators
.Ternary Operator (Conditional)
.Nullish Coalescing
.Optional Chaining

ParseInt() = method

String change into integer.

(NAN) = not a number

Arithmetic Operators:

`+`       Addition            
 `-`       Subtraction        
 `*`       Multiplication     
 `/`       Division            
 `%`       Modulus (remainder) 
 `**`      Exponentiation      
 `++`      Increment           
 `--`      Decrement           

Example:
10+5=15
"10"+5=105
"10"-string
10-5=5
10-15=-5
"10"-5=5
"7"*3=21
10/2=5
10%2=0

true-1
false-0

JavaScript

let i = 5;
let j = 7;
let result = ++i - --j + j-- + j++ - --i;


Initial values:
- `i = 5`
- `j = 7`

Now evaluate `result = ++i - --j + j-- + j++ - --i;`


Step-by-step evaluation:

1. *`++i`* → Pre-increment `i`:
   - `i = 6`
   - Expression becomes: `6 - ...`

2. *`--j`* → Pre-decrement `j`:
   - `j = 6`
   - Expression so far: `6 - 6 + ...`

3. *`j--`* → Post-decrement `j`:
   - Value used = 6
   - `j = 5` after this
   - Expression so far: `6 - 6 + 6 + ...`

4. *`j++`* → Post-increment `j`:
   - Value used = 5
   - `j = 6` after this
   - Expression so far: `6 - 6 + 6 + 5 + ...`

5. *`--i`* → Pre-decrement `i`:
   - `i = 5`
   - Final expression: `6 - 6 + 6 + 5 - 5`


Final Calculation:

`6 - 6 + 6 + 5 - 5 = 0 + 6 + 5 - 5 = 6 + 5 - 5 = 6`


Final Values:
- `i = 5`
- `j = 6`
- `result = 6`

Assignment Operators:

 `=`      
 `+=`     
 `-=`     
 `*=`    
 `/=`    
 `%=`     
 `**=`  

Comparison Operators:

`==`      Equal to (loose equality)              
 `===`     Equal value and type (strict equality)   
 `!=`      Not equal to                            
 `!==`     Not equal value or type                
 `>`       Greater than                       
 `<`       Less than                  
 `>=`      Greater than or equal               
 `<=`      Less than or equal     

Logical Operators:

&&  Logical AND 

!   Logical NOT

String Operators:

+   Concatenation   

+=  Append and assign