What is the formula function to round down?

The function used to round down a number to the nearest integer in many programming languages and mathematical contexts is known as the floor function. This function effectively takes a numeric value and reduces it to the largest whole number that is less than or equal to the original value. For example, if you apply the floor function to 3.7, the result would be 3.

Using this function is particularly useful in cases where retaining the integrity of whole numbers is crucial, such as in financial calculations or inventory counts, where partial quantities may not be applicable.

The other functions mentioned serve different purposes. For instance, the round function typically rounds to the nearest integer based on standard rounding rules. The ceil function, on the other hand, rounds a number upwards to the nearest whole number. The lower function doesn't exist within standard mathematical functions for rounding, which makes the floor function the appropriate choice in this context.