The standard math functions are
listed below. These functions should be used only on numeric arguments.
An error message will be printed if a string argument is passed
to a math function.
12.5.1.1 Addition
12.5.1.2 Subtraction
12.5.1.3 Multiplication
12.5.1.4 Division
12.5.1.5 Integer Division
12.5.1.6 Maximum Numeric Value
12.5.1.7 Minimum Numeric Value
12.5.1.8 Absolute Value
12.5.1.9 Convert To Float
12.5.1.10 Convert To Integer