RANGE(X) returns the decimal exponent range in the model of the type of X. RESULT = RANGE(X) | X | Shall be of type INTEGER, REAL or COMPLEX. |
INTEGER and of the default integer kind. PRECISION for an example.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-6.3.0/gfortran/RANGE.html