forums.silverfrost.com

[StamK]

This doesn't seem to work for large enough values

[mecej4]

The constant 2069434590944 is too big for default kind integer, so is 4069434590944, and similarly any integer greater than 2^31 - 1. Change the format to 4069434590944_ip, where "ip" has been previously declared as a kind parameter (e.g. 4. or using the intrinsic SELECTED_INT_KIND()) for large integers, or append '_4'. Some compilers may not check the expression for range checks unless a suitable compiler option is in effect.

Note that kind numbers are not necessarily portable, so _4 may give problems when you use a different compiler than FTN95.

[JohnCampbell]

There is no simple way to define an integer*8 constant > 2147483647 other than using a kind suffix, using either _4, _i8 or _int64.
The fortran standard says that 2147483648 is a standard integer value and so would be truncated or an error reported.
You could try modifying the following program to see the error messages.