Question

Following on from this question what would be the best way to write a Char.IsHex() function in C#. So far I’ve got this but don’t like it:

bool CharIsHex(char c) {     c = Char.ToLower(c);     return (Char.IsDigit(c) || c == 'a' || c == 'b' || c == 'c' || c == 'd' || c == 'e' || c == 'f') } 

Answer 1

From my answer to the question you linked to:

bool is_hex_char = (c >= '0' && c <= '9') ||                    (c >= 'a' && c <= 'f') ||                    (c >= 'A' && c <= 'F');