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