Left Shift Assignment Operator (<<=) (JavaScript)

Moves the specified number of bits to the left and assigns the result to result. The bits vacated by the operation are filled with 0.


result <<= expression  


Any variable.

The number of bits to move.


Using the <<= operator is the same as specifying result = result << expression

The following example shows how to use the <<= operator.

// 14 is 00000000000000000000000000001110  
var temp = 14;  
temp <<= 2;   
// 56 is 00000000000000000000000000111000  
Output: 56  


Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

See Also

Bitwise Left Shift Operator (<<)
Bitwise Right Shift Operator (>>)
Unsigned Right Shift Operator (>>>)
Operator Precedence
Operator Summary (JavaScript)