Originally posted by DeLastOne:

Hi

I can see my total population at start is 2001M. Does it mean... 2 billion ? Why not use B instead of M ?

I am really asking out of curiosity as it doesn't really bother me.

Because it is needed years to increase 2B to 3B, while using millions allow you to see population increase more precisely. By changing to billions with decimals this can make problems to programming i think.