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/GNU Fortran 7

9.62 CMPLX — Complex conversion function

Description:

CMPLX(X [, Y [, KIND]]) returns a complex number where X is converted to the real component. If Y is present it is converted to the imaginary component. If Y is not present then the imaginary component is set to 0.0. If X is complex then Y must not be present.

Standard:

Fortran 77 and later

Class:

Elemental function

Syntax:

RESULT = CMPLX(X [, Y [, KIND]])

Arguments:
X The type may be INTEGER, REAL, or COMPLEX.
Y (Optional; only allowed if X is not COMPLEX.) May be INTEGER or REAL.
KIND (Optional) An INTEGER initialization expression indicating the kind parameter of the result.
Return value:

The return value is of COMPLEX type, with a kind equal to KIND if it is specified. If KIND is not specified, the result is of the default COMPLEX kind, regardless of the kinds of X and Y.

Example:
program test_cmplx
    integer :: i = 42
    real :: x = 3.14
    complex :: z
    z = cmplx(i, x)
    print *, z, cmplx(x)
end program test_cmplx
See also:

COMPLEX

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