Fix

The Fix function rounds a floating-point number down to the nearest integer. If the number is positive, then the decimal fraction is truncated no matter how big it is (12.99 becomes 12). If the number is negative, the number is rounded up (-12.99 becomes -12).

In math there is a function called floor that does something similar. The function that behaves exactly like floor is Int. The only differenct between Int and Fix is the way that negative numbers are treated.