# sqrt(3) [v7 man page]

SQRT(3) Linux Programmer's Manual SQRT(3)NAME

sqrt, sqrtf, sqrtl - square root functionSYNOPSIS

#include <math.h> double sqrt(double x); float sqrtf(float x); long double sqrtl(long double x); Link withFeature Test Macro Requirements for glibc (see feature_test_macros(7)): sqrtf(), sqrtl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE-lm.DESCRIPTION

These functions return the nonnegative square root of x.RETURN VALUE

On success, these functions return the square root of x. If x is a NaN, a NaN is returned. If x is +0 (-0), +0 (-0) is returned. If x is positive infinity, positive infinity is returned. If x is less than, a domain error occurs, and a NaN is returned.-0ERRORS

See math_error(7) for information on how to determine whether an error has occurred when calling these functions. The following errors can occur: Domain error: x less thanerrno is set to EDOM. An invalid floating-point exception (FE_INVALID) is raised.-0ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7). +-------------------------+---------------+---------+ |Interface | Attribute | Value | +-------------------------+---------------+---------+ |sqrt(), sqrtf(), sqrtl() | Thread safety | MT-Safe | +-------------------------+---------------+---------+CONFORMING TO

C99, POSIX.1-2001, POSIX.1-2008. The variant returning double also conforms to SVr4, 4.3BSD, C89.SEE ALSO

cbrt(3), csqrt(3), hypot(3)COLOPHON

This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2017-09-15 SQRT(3)

## Check Out this Related Man Page

NAME

sqrt, sqrtf, sqrtl - square root functionSYNOPSIS

#include <math.h> double sqrt(double x); float sqrtf(float x); long double sqrtl(long double x); Link withFeature Test Macro Requirements for glibc (see feature_test_macros(7)): sqrtf(), sqrtl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE-lm.DESCRIPTION

These functions return the nonnegative square root of x.RETURN VALUE

On success, these functions return the square root of x. If x is a NaN, a NaN is returned. If x is +0 (-0), +0 (-0) is returned. If x is positive infinity, positive infinity is returned. If x is less than, a domain error occurs, and a NaN is returned.-0ERRORS

See math_error(7) for information on how to determine whether an error has occurred when calling these functions. The following errors can occur: Domain error: x less thanerrno is set to EDOM. An invalid floating-point exception (FE_INVALID) is raised.-0ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7). +-------------------------+---------------+---------+ |Interface | Attribute | Value | +-------------------------+---------------+---------+ |sqrt(), sqrtf(), sqrtl() | Thread safety | MT-Safe | +-------------------------+---------------+---------+CONFORMING TO

C99, POSIX.1-2001, POSIX.1-2008. The variant returning double also conforms to SVr4, 4.3BSD, C89.SEE ALSO

cbrt(3), csqrt(3), hypot(3)COLOPHON

This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2017-09-15 SQRT(3)