JavaScript tutorial:
>>= operator


The (>>=) operator is used to shift the bits of an expression to the right, preserving sign.


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 right by the number of bits specified in expression. The sign bit of result is used to fill the digits from the left. Digits shifted off the right are discarded. For example, after the following code is evaluated, temp has a value of -4: 14 (11110010 in binary) shifted right two bits equals -4 (11111100 in binary).

temp = -14;
temp >>= 2;

To run the code above, paste it into JavaScript Editor, and click the Execute button.

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