What is the significance of radix in Character.fordigit() in Java?

Question

Could someone please help me understand the significance of radix in the Character.forDigit(int digit, int radix) method?

Answer 1

Choosing a suitable radix lets you produce "digits" that are not decimal digits - for example, if you pass 16 for the radix, you can produce characters for digits ten through fifteen, because counting in hex uses sixteen digits - 0 through 9, followed by A through F:

char ten = Character.forDigit(10, 16); // returns 'a'

Demo.