# _SHR

Jump to navigation
Jump to search

The _SHR function is used to shift the bits of a numerical value to the right.

## Syntax

*result*= _SHR(*numericalVariable*,*numericalValue*)

## Parameters

*numericalVariable*is the variable to shift the bits of and can be of the following types: INTEGER, LONG, _INTEGER64, or _BYTE.- Integer values can be signed or _UNSIGNED.
*numericalValue*the number of places to shift the bits.- While 0 is a valid value it will have no affect on the variable being shifted.

## Description

- Allows for division of a value by 2 faster than normal division (see example 2 below).
- Bits that reach the end of a variables bit count are dropped.
- The type of variable used to store the results should match the type of the variable being shifted.
- NOTE: When dealing with SIGNED variables, shifting the bits right will leave the sign bit set. This is due to how C++ deals with bit shifting under the hood.

## Availability

- Version 1.3 and up.

## Examples

*Example 1:*

A~%% = 128 'set left most bit of an_UNSIGNED _BYTE PRINT A~%% PRINT _SHR(A~%%,7) PRINT _SHR(A~%%,8) 'shift the bit off the right 'edge'

128 1 0

*Example 2:*

A~%% = 128 FOR I%% = 0 TO 8 PRINT _SHR(A~%%, I%%) NEXT I%%

128 64 32 16 8 4 2 1 0

## See also

*Navigation:*