SQRT — Square-root function

Description

SQRT(X) computes the square root of X.

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

Standard

Fortran 77 and later

Class

Elemental function

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