Populating_Array

int i = 0;
char r = 'r';
int num;

char letters[13];
int numeri[13];


void setup() {
   Serial.begin(9600);
}


void loop() {

    num = random(1,11);

        if(i > 13) {
              i = 0;
            }

      i++;
      letters[i] = r;
      numeri[i] = num;

    Serial.print("letters[i]: "); Serial.println(letters[i]);
    Serial.print("letters"); Serial.println(letters);
    Serial.print('\0');
    Serial.print("numeri[i]: "); Serial.println(numeri[i]);

    delay(500);

}