String st1 = "Al-Huson";
String st2 = "College";

void setup() {

  
  Serial.begin(9600);

  // charAt(n)
  Serial.print("charAt(3) in st1: ");
  Serial.println(st1.charAt(3)); 

  // compareTo(S2)
  Serial.print("compareTo(st2): ");
  Serial.println(st1.compareTo(st2));  

  //  concat(S2)
  Serial.print("Concatenation of st1 and st2: ");
  Serial.println(st1.concat(st2));  

  //  endsWith(S2)
  Serial.print("st1 ends with 'son': ");
  Serial.println(st1.endsWith("son"));  
  //  equals(S2)
  Serial.print("st1 equals st2: ");
  Serial.println(st1.equals(st2));  
}

void loop() {
  // put your main code here, to run repeatedly:

}