The INTEGER-PART function returns an integer that is the integer portion of argument-1. The type of this function is integer.

- Argument-1 must be class numeric.

- If the value of argument-1 is zero, the returned value is zero.
- If the value of argument-1 is positive, the returned value is the greatest integer less than or equal to the value of argument-1. For example, if the value of argument-1 is +1.5, +1 is returned.
- If the value of argument-1 is negative, the returned value is the least integer greater than or equal to the value of argument-1. For example, if the value of argument-1 is -1.5, -1 is returned.