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