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# docs.GL

GLSL 4
GLSL ES 3

# bitCount

## Name

bitCount — counts the number of 1 bits in an integer

## Declaration

`genIType bitCount(` | genIType value`)`;

`genIType bitCount(` | genUType value`)`;

## Parameters

`value`

  Specifies the value whose bits to count.

## Description

`bitCount` returns the number of bits that are set to 1 in the binary representation of `value`.

## Version Support

| OpenGL Shading Language Version
--- | ---
Function Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50
bitCount | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔

## See Also

findLSB, findMSB

## Copyright

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. https://opencontent.org/openpub/.

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