- NAME
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sqrt - square root function.
- SYNOPSIS
#include <math.h>
double sqrt(double x);- DESCRIPTION
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The sqrt() function returns the non-negative square root of x. It fails and sets errno to EDOM, if x is negative.
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Warning
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You’ll also need to link the program against the math library (see example below) using the -lm compile/link option.
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- RETURN VALUE
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Square root of x.
- ERRORS
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EDOM - x is negative.
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- SEE ALSO
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exp, log, log10, pow
- EXAMPLE
link:src/sqrt.c[role=include]- OUTPUT
$ gcc -Wall -lm sqrt.c $ ./a.out sqrt(1024.000000) = 32.000000