Message This integer constant value will be given the type long long int. This is compatible with the C99 standard. Older versions of the compiler would have given this unsigned long int type. Description With the introduction of the long long int type, the C99 standard changed the rules for how the type of certain integer constants are determined. Unsuffixed decimal constants which are too large for long int, but could fit in an unsigned long int are given the type long long int in C99. Prior to C99 these would be given unsigned long int type. User Action Be aware of this difference.