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/GNU Fortran 7

9.255 SQRT — Square-root function

Description:

SQRT(X) computes the square root of X.

Standard:

Fortran 77 and later

Class:

Elemental function

Syntax:

RESULT = SQRT(X)

Arguments:
X The type shall be REAL or COMPLEX.
Return value:

The return value is of type REAL or COMPLEX. The kind type parameter is the same as X.

Example:
program test_sqrt
  real(8) :: x = 2.0_8
  complex :: z = (1.0, 2.0)
  x = sqrt(x)
  z = sqrt(z)
end program test_sqrt
Specific names:
Name Argument Return type Standard
SQRT(X) REAL(4) X REAL(4) Fortran 95 and later
DSQRT(X) REAL(8) X REAL(8) Fortran 95 and later
CSQRT(X) COMPLEX(4) X COMPLEX(4) Fortran 95 and later
ZSQRT(X) COMPLEX(8) X COMPLEX(8) GNU extension
CDSQRT(X) COMPLEX(8) X COMPLEX(8) GNU extension

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gfortran/SQRT.html