Check if the value is between 0 and the range.

from( value, range )

This function is commonly used with the time() function to evaluate a time range.

If the value is negative or larger than range the from() function returns 0. Otherwise the function returns the difference between range and value.

from(35, 40)  // returns 5 (=40-35)

from(42, 40)  // returns 0

from(-4, 40)  // returns 0

from(time(17,00), 30)   // Will return a positive number between 17:00 and 17:29 (inclusive). Otherwise returns 0.