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Microsoft® JScript™
>>= Operator
 Language Reference 
Version 1 

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Description
Used to shift the bits of an expression to the right, preserving sign.
Syntax
result >>= expression

The >>= operator syntax has these parts:

Part Description
result Any variable.
expression Any expression.

Remarks
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).

var temp
temp = -14
temp >>= 2

For information on when a run-time error is generated by the >>= operator, see the Operator Behavior table.


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