CONSTANTS(g) or C(g) provides the value of various constants, according to the contents of g: e (for a string of 'e'), π ('pi'), missing value ('*' or 'missingvalue'), the conversion factor by which to multiply radians to get degrees ('degrees'), the conversion factor by which to multiply degrees to get radians ('radians'), the number ε defined as the smallest number such that the calculation 1+ε is detectable on the computer as greater than one ('epsilon'), the number used to represent infinity e.g when defining axes for graphics ('infinity' or '+infinity'), and the number used represent minus infinity ('-infinity'). The string can be specified in either upper or lower case (or any mixture) and can be abbreviated just like the string settings of options such as PRINT.