Javascript Operators
Operators in javascript¶
JavaScript operators are used to assign values, compare values, perform arithmetic operations, and more.
Assignment (=) Operators¶
| Operator | Description | Example |
|---|---|---|
| = | Assign | 10+10 = 20 |
| += | Add and assign | var a=10; a+=20; Now a = 30 |
| -= | Subtract and assign | var a=20; a-=10; Now a = 10 |
| *= | Multiply and assign | var a=10; a*=20; Now a = 200 |
| /= | Divide and assign | var a=10; a/=2; Now a = 5 |
| %= | Modulus and assign | var a=10; a%=2; Now a = 0 |
Arithmetic Operators¶
| Operator | Description | Example |
|---|---|---|
| + | Addition | 10+20 = 30 |
| - | Subtraction | 20-10 = 10 |
| * | Multiplication | 10*20 = 200 |
| / | Division | 20/10 = 2 |
| % | Modulus (Remainder) | 20%10 = 0 |
| ++ | Increment | var a=10; a++; Now a = 11 |
| -- | Decrement | var a=10; a--; Now a = 9 |
Comparison Operators¶
| Operator | Description | Example |
|---|---|---|
| == | Is equal to | 10==20 = false |
| === | Identical (equal and of same type) | 10==20 = false |
| != | Not equal to | 10!=20 = true |
| !== | Not Identical | 20!==20 = false |
| > | Greater than | 20>10 = true |
| >= | Greater than or equal to | 20>=10 = true |
| < | Less than | 20<10 = false |
| <= | Less than or equal to | 20<=10 = false |
Logical Operators¶
| Operator | Description | Example |
|---|---|---|
| && | Logical AND | (10==20 && 20==33) = false |
| || | Logical OR | (10==20 || 20==33) = false |
| ! | Logical Not | !(10==20) = true |
Ternary Operator¶
It's the simplest form of writing the if else condition.
Example:
let marks = 30;
let result = marks > 50 ? 'pass' : 'fail';
console.log('result = ', result)