The (<<=) operator is used to shift the bits of an expression to the left.
Syntax
result <<= expression
The <<= operator syntax has these parts:
Example
Using the <<= operator is exactly the same as specifying:
result = result << expression
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The <<= operator shifts the bits of result left by the number of bits specified in expression. For example:
temp = 14
temp <<= 2
document.write(temp);
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 To run the code above, paste it into JavaScript Editor, and click the Execute button.
The variable temp has a value of 56 because 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.
See also: << Operator,>> Operator, >>> Operator, Operator Behavior, Operator Precedence, Operator Summary |
