Question

If input is a string “783” and I keep getting chars out of the string via input.charAt(i), is the only way to get the equivalent integer Character.digit(input.charAt(i),10) ??

Is there a simpler expression ?

Answer 1

That’s the safest way to do it, but you can also simply subtract 48 from the character value, because 0-9 are 48-57 in unicode decimal values.

int c = input.charAt(i) - 48;

This will of course return unrealistic results if the character is something other than a digit however (for example 'A' - 48 is 17).