What does “L” mean at the end of an integer literal?

Question

I have this constant:

#define MAX_DATE 2958465L 

What does L mean in this sense?

Answer 1

This is an integer literal long .

Integer literals are of type int by default; the suffix L gives it a type of long (note that if the value cannot be represented by int , then the literal will be of type long even without a suffix).