L suffix in numeric literals

I guess this is a newbie question, but I couldn't find the answer in the FTN95 help. What is the L suffix in numeric literals in the following line?

ans=winio@('%ca[Hello, world!]%sp',100L,100L)

Long, as in 4 byte integers. This is now the default, but there was a time when everyone seemed to use 2-byte integers.

There's a lot of archaeology in the help files!

E