- NUMBER ALTERATION FUNCTIONS NUMBER ALTERATION FUNCTIONS The number alteration functions act upon the number in the display(X-register). Integer Portion. Pressing g INT replaces the number in the display with the nearest integer of lesser or equal magnitude. Fractional Portion. Pressing f FRAC replaces the number in the display with its fractional part(that is, the difference between the number and its integral part). Rounding. Pressing g RND rounds all 10 internally held digits of the mantissa of the displayed value to the number of digits specified by the current FIX, SCI, or ENG display format. Absolute Value. Pressing g ABS yields the absolute value of the number in the display.