Use the INT function when you want only the integer part of a decimal number, and it's ok to always round the number down. For example, INT (3.99) returns the number 3.
It's important to note that INT actually rounds down numbers to the next lowest integer value.
So, while INT (10.8) = 10, INT(-10.8) = -11.
Use the TRUNC function if you want the exact integer part of both negative and positive numbers.