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Defined in header <math.h>
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float       sqrtf( float arg );
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double      sqrt( double arg );
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<td >
long double sqrtl( long double arg );
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<td class="t-dcl-nopad"> </td> <td > (since C99) </td> </tr> Template:ddcl list end

Computes square root of arg.

Parameters

arg - floating point or integer value

Return value

Square root of arg.

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

See also

Template:c/numeric/math/dcl list cbrtTemplate:c/numeric/math/dcl list pow