Convert to a KIND=4 integer type, which is the same size as a C long integer. This is equivalent to the standard INT intrinsic with an optional argument of KIND=4, and is only included for backwards compatibility.
GNU extension
Elemental function
RESULT = LONG(A)
| A | Shall be of type INTEGER, REAL, or COMPLEX. |
The return value is a INTEGER(4) variable.
© Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gfortran/LONG.html