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# docs.GL

GLSL 4
GLSL ES 3

# modf

## Name

modf — separate a value into its integer and fractional components

## Declaration

`genType modf(` | genType x,
| out genType i`)`;

`genDType modf(` | genDType x,
| out genDType i`)`;

## Parameters

`x`

  Specify the value to separate.

`out i`

  A variable that receives the integer part of the argument.

## Description

`modf` separates a floating point value `x` into its integer and fractional parts. The fractional part of the number is returned from the function and the integer part (as a floating point quantity) is returned in the output parameter `i`.

## 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
modf (genType) | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔
modf (genDType) | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔

## See Also

fract, floor

## 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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