How to repeat a non loop void ? [SOLVED]

Projects Programming
2

many ways. one will be:

char state;

void example() {
  while('4' != state) { //if you read input from serial monitor it will be char type
    Serial.printlc("wait for you to press 4");
    state = Serial.read();//assuming you read intput from serial
    delay(100);
  }
}

Ond use code editor tag instead os screen shot.. It more easier to read.