A program with String functions.

import java.io.*;
import java.lang.*;
import java.lang.String;

class pro1
{
public static void main(String args[])throws IOException
{
int a=1,b=2,c=3,d=4;

System.out.println(1+2);
System.out.println(+1+2);
System.out.println(a+1+2);
System.out.println(d+a+1+2);
System.out.println(a+b);
System.out.println(a+""+b);
System.out.println(a+""+b+1);
System.out.println(a+""+(b+1));
System.out.println(a+"j" +1+2);

String a1="Jasminder";
int zx = a1.indexOf('r');
int l = a1.length();
char a2 = a1.charAt(0);

System.out.println(a2+ "\n" +l);
System.out.println("\n" +zx);

String b2="Jasminderrr";
int zx2 = b2.lastIndexOf('r');
System.out.println(zx2);

System.out.println(a1.length());
System.out.println(a1.toUpperCase());
System.out.println(a1.toLowerCase());
System.out.println(a1);


}}