Tonumber

Available since: Gideros 2011.6
Class: (global)

Tries to convert its argument to a number. <syntaxhighlight lang="lua"> (number) = tonumber(e,base) </source>

If the argument is already a number or a string convertible to a number, tonumber returns this number, otherwise returns nil.

An optional argument specifies the base to interpret the numeral. The base may be any integer between 2 and 36, inclusive:

in bases above 10, the letter 'A' (in either upper or lower case) represents 10, 'B' represents 11, and so forth, with 'Z' representing 35
in base 10 (the default), the number can have a decimal part, as well as an optional exponent part
in other bases, only unsigned integers are accepted

e: (any) value to convert to number
base: (varies) the base to convert number to, default: 10 optional

Returns (number) returns the number or nil if it could not be converted

Anonymous