An assignment operator requires two operands. The value of the right operand is assigned to the left operand. The sign = denotes the simple assignment operator. JavaScript also has several compound assignment operators, which is actually shorthand for other operators. A list of all such operators are listed below.
| Name | Syntax | Meaning |
|---|---|---|
| Assignment | x = y | x = y |
| Addition assignment | x += y | x =x+ y |
| Subtraction assignment | x -= y | x = x - y |
| Multiplication assignment | x *= y | x = x * y |
| Division assignment | x /= y | x = x / y |
| Remainder assignment | x %= y | x = x % y |
| Exponentiation assignment | x **= y | x = x ** y |
| Left shift assignment | x <<= y | x = x << y |
| Right shift assignment | x >>= y | x = x >> y |
| Unsigned right shift assignment | x >>>= y | x = x >>> y |
| Bitwise AND assignment | x &= y | x = x & y |
| Bitwise XOR assignment | x ^= y | x = x ^ y |
| Bitwise OR assignment | x |= y | x = x | y |
| Logical AND assignment | x &&= y | x && (x = y) |
| Logical OR assignment | x ||= y | x || (x = y) |
| Logical nullish assignment | x ??= y | x ?? (x = y) |
An = assignment operator assigns the value of the right-hand operand to the left-hand variable.
var x = 25;
var y = 25*100;
var z = x+y;
All operators except = listed in the table above are compound assignment operators. They are actually shorthand notations
For Examples
The Addition assignment += operator adds a value to a variable.
var x = 25;
x +=25; //50;
is actually shorthand for
var x= 25;
x = x + 25; //50
9 & 7 = 1
00000000000000000000000000001001 =9
00000000000000000000000000000111 =7
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00000000000000000000000000000001 =1
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Examples
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