The from_str_radix method perform string to integer convertion for a specific radix, but how to do the opposite, convert a integer into a string with a specific radix ?
For the pre-defined bases of 2, 8, 10, and 16, use the built-in formatting traits: Binary, Octal, Display, LowerHex and UpperHex. For any other base, it's still trivial to roll your own by repeated division and remainder taking.
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