Microsoft JScript
<<= Operator
Language Reference
Version 1

See Also

Used to shift the bits of an expression to the left.
result <<= expression

The <<= operator syntax has these parts:

Part Description
result Any variable.
expression Any expression.
Using the <<= operator is exactly the same as specifying:

result = result << expression

The <<= operator shifts the bits of result left by the number of bits specified in expression. For example:

var temp temp = 14
temp <<= 2 

The variable temp has a value of 56 as 14 (00001110 in binary) shifted left two bits equals 56 (00111000 in binary). Bits are filled in with zeroes when shifting. For information on when a run-time error is generated by the <<= operator, see the Operator Behavior table.