RANGE(X) returns the decimal exponent range in the model of the type of X.
Fortran 95 and later
Inquiry function
RESULT = RANGE(X)
| X | Shall be of type INTEGER, REAL or COMPLEX. |
The return value is of type INTEGER and of the default integer kind.
See PRECISION for an example.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gfortran/RANGE.html