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# sqrt

From cppreference.com
< c‎ | numeric‎ | math

Defined in header `<math.h>` |  |
float sqrtf( float arg ); |  | (since C99)
double sqrt( double arg ); |  |
long double sqrtl( long double arg ); |  | (since C99)

Computes square root of `arg`.

### [edit] Parameters

arg | - | floating point or integer value

### [edit] Return value

Square root of `arg`.

Domain error occurs if `arg` is negative. NAN is returned in that case.

### [edit] See also

cbrt (C99) | computes cubic root (3√x) (function) [edit]
pow | raises a number to the given power (xy) (function) [edit]
C++ documentation for sqrt

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