thebookofshaders/glossary/sqrt.md
2015-04-18 10:41:34 -04:00

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## Sqrt
Return the square root of the parameter
### Declaration
```glsl
float sqrt(float x)
vec2 sqrt(vec2 x)
vec3 sqrt(vec3 x)
vec4 sqrt(vec4 x)
```
### Parameters
```x``` specify the value of which to take the square root.
### Description
```sqrt()``` returns the square root of ```x```.
<div class="simpleFunction" data="y = sqrt(x); "></div>
<div class="codeAndCanvas" data="../07/circle-making.frag"></div>
### See Also
[inversesqrt](index.html#inversesqrt.md), [pow](index.html#pow.md), [Chapter 05: Shaping Functions](../05/)