JavaScript operators are used to assign values, compare values, perform arithmetic operations like addition,
multiplication,division, substractions and many more.
In this tutorial we are going learn JavaScript Operators and how to use them in programme.
JavaScript Arithmetic Operators
Arithmetic operators are used to perform arithmetic operation.
| Operator | Sign/Symbol | Example |
|---|---|---|
| Addition | + | x=4+2+2; Result x=8 |
| Subtraction | – | x=4-2-2; Result x=0 |
| Multiplication | * | x=4*2*2; Result x=16 |
| Division | / | x=4/2; Result x=2 |
| Modulus or Division Remainder | % | x=15%2; Result x=1 |
| Increment | ++ | x=5;x=x++; Result x=6 |
| Decrement | — | x=5;x=x–; Result x=4 |
JavaScript Assignment Operators
Assignment operators assign values to JavaScript variables and constant.
| Operator | Example | Reference |
|---|---|---|
| = | x = y | x = y |
| += | x += y | x = x + y |
| -= | x -= y | x = x – y |
| *= | x *= y | x = x * y |
| /= | x /= y | x = x / y |
| %= | x %= y | x = x % y |
The addition assignment operator += adds a value to a variable just like .= in PHP
JavaScript Logical Operators
Logical Operators adds logic in aProgram.
| Operator | Reference |
|---|---|
| && | Logical and |
| ! | Logical not |
| || | Logical or |
JavaScript Comparison Operators
Comparison Operators used for comparing data or values.
| Operator | Reference |
|---|---|
| == | equal to |
| === | equal value and equal type (rarely used) |
| != | not equal |
| !== | not equal value or not equal type (rarely used) |
| > | greater than |
| >= | greater than or equal to |
| < | less than |
| <= | less than or equal to |
| ? | ternary operator |
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