isHexadecimalCharacter function

bool isHexadecimalCharacter(
  1. String character
)

Check if a character is hexadecimal

Implementation

bool isHexadecimalCharacter(String character) {
  return (character.compareTo('0') >= 0 && character.compareTo('9') <= 0) ||
      (character.compareTo('a') >= 0 && character.compareTo('f') <= 0) ||
      (character.compareTo('A') >= 0 && character.compareTo('F') <= 0);
}