From Xojo Documentation
Returns the value specified rounded down to the nearest whole number.
result = Floor (value)
|result||Double||The floor of value.|
|value||Double||The value you want the floor of.|
The result of this function is a Double, but it will always contain a whole number.
This example uses the Floor function to return floor of a number.
Because Floor will always return a whole number, to round a decimal value to a certain number of places, you must first multiple the number by 10^(the number of decimal places to which you wish to round) then take the value returned by Floor of that number and divide it by 10^(the number of decimal places to which you wish to round). In this example, the value 1.2345 is being rounded to two decimal places: