| strnat | string to natural number function |
| Syntax | strnat ( s : string [ , base : int ] ) : nat
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| Description | The strnat function is used to convert a string to a natural number. The natural number is equivalent to string s. The number base parameter is optional, for example, strnat("47") = 47. String s must consist of a possibly null sequence of blanks, then an optional plus sign, and finally a sequence of one or more digits. For number bases larger than 10, the digits can include a, b, c … (alternately A, B, C …) which represent the digit values 10, 11, 12 … The base, if given, must be in the range 2 to 36 (36 because there are 10 base ten digits and 26 letters). For example, strnat("FF", 16) = 255. The natstr function is the inverse of strnat, so for any natural number n, strnat( natstr (n)) = n. The strnat function is similar to strint, except that strnat handles values that are larger than int values and does not handle negative values.
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| See also | the chr, ord, intstr and strint functions.
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