Count_char

void setup() {
  println(count_char('a', "camera"));
}
int count_char(char word, String sentence) {
  int totalChar = 0;
  for (int i =0; i<sentence.length (); i++) {
    if (word == sentence.charAt(i)) {
      totalChar = totalChar + 1;
    }
  }
  return totalChar;
}