HUGE(X) returns the largest number that is not an infinity in the model of the type of X. 
Fortran 90 and later
Inquiry function
RESULT = HUGE(X) 
| X | Shall be of type REALorINTEGER. | 
The return value is of the same type and kind as X
program test_huge_tiny print *, huge(0), huge(0.0), huge(0.0d0) print *, tiny(0.0), tiny(0.0d0) end program test_huge_tiny
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    https://gcc.gnu.org/onlinedocs/gcc-10.2.0/gfortran/HUGE.html