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sqrt, sqrtf, sqrtl - square root function
#include <math.h>
double sqrt(double x);
float sqrtf(float x);
long double sqrtl(long double x);
The sqrt() function returns
the non-negative square root of x. It fails and sets errno to EDOM, if x
is negative.
- EDOM
- x is negative.
SVID 3, POSIX, BSD 4.3,
ISO 9899. The float and the long double variants are C99 requirements.
hypot(3)
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