JavaScript Tutorial #05 Operators
Posted at: May 9, 2019 3:49 PM
In this lesson we will learn about operators in JavaScript.
An operator is a special type of symbols that performing specific types of operations. Like as 5 + 6 * 10 = 65 here is + and * is operators and 5, 6 and 10 is operands.
In JavaScript supports following types of operators.
- Arithmetic Operators
- Assignment Operators
- Comparison Operators
- Logical Operators
- Bitwise Operators
- String Operators
- Conditional (ternary) Operators
Arithmetic Operators
JavaScript support following arithmetic operators
| Operators | Name |
|---|---|
| + | addition |
| - | subtraction |
| * | multiplication |
| / | division |
| % | modulo (returns the remainder) |
| ++ | increment (can be prefix or postfix) |
| -- | decrement (can be prefix or postfix) |
Example
Assignment Operators
Assignment operator is used to assign a value to a variable.
| Operators | Name |
|---|---|
| = | assign |
| += | add and assign |
| -+ | subtract and assign |
| *= | multiply and assign |
| /= | divide and assign |
| %= | modulo and assign |
Example
Comparison Operators
A comparison operators compare the operands with comparison operators and return logical value based on comparison is true.
| Operators | Name |
|---|---|
| == | equal |
| != | not equal |
| > | greater than |
| >= | greater than or equal to |
| < | less than |
| <= | less than or equal to |
| === | identical (equal and of same type) |
| !== | not identical |
Example
Logical Operators
Logical operators used with boolean values. More than one relation can be logically joined using logical operators.
| Operators | Name |
|---|---|
| && | Logical AND |
| || | Logical OR |
| ! | Logical NOT |
Example
Bitwise Operators
JavaScript support following binary bitwise operators.
| Operators | Name |
|---|---|
| & | AND |
| | | OR |
| ^ | XOR |
| ~ | NOT |
| << | shift left (zero fill at right) |
| >> | shift right |
In Bitwise opertators converts operands in 32 bits numbers and work with bit by bit. For example the number of 5 and 6 have the binary represatation of 0101 and 0110.
Example
String Operators
Using string opertators concatenate the string.
| Operators | Name |
|---|---|
| + | concatenation |
| += | concatenate and assign |
Example
Conditional (ternary) Operators
The conditional operator creates an expression that evaluates as one of two expressions depending on a condition.
conditions ? value1 : value2
Example
This lesson also available on YouTube
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