What is the function of the Oracle FLOOR function?

The FLOOR function in Oracle is used to round a number down to the nearest integer, returning the largest integer value that is less than or equal to the specified expression. If the specified expression is a positive number, the FLOOR function will return the largest integer value that is less than or equal to the specified expression; if the specified expression is a negative number, the FLOOR function will return the smallest integer value that is less than or equal to the specified expression. The FLOOR function can be used on any numeric data type column or expression.