API tonumber

tonumber() -Documentation by Two, updated by Drundia 21:59, 25 April 2006 (EDT)-

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Native Lua statement:

Arguments

tonumber(arg {,base})

arg - this value will be converted to a numeric value.

base - 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 may have a decimal part, as well as an optional exponent part. In other bases, only unsigned integers are accepted.

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Returns

The argument as a numeric value or nil if the value cannot be converted.

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Examples

tonumber("123")  
--Returns 123

tonumber("argqerg")  
--Returns nil

tonumber("13", 8)
--Returns 11

tonumber ("D", 16)
--Returns 13

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