Which function would you use to round a number down to the nearest integer?

To round a number down to the nearest integer, the most appropriate function is Rounddown. This function takes a single argument: the number you want to round and the number of digits to which you want to round it. When the number of digits is set to zero, Rounddown effectively truncates any decimal portion, ensuring that the value is rounded down to the nearest whole number regardless of its decimal value.

For example, if you apply the Rounddown function to the number 3.7, it will return 3, and if you apply it to -3.7, it will return -4. This behavior aligns perfectly with what is required when the objective is to round down.

In contrast, the other options serve different purposes. The Round function rounds to the nearest integer based on standard rounding rules, the Roundup function always rounds up to the nearest integer, and the Ceiling function rounds a number up to the nearest specified multiple. Therefore, Rounddown is the only function that guarantees rounding down specifically.