5 simple programs in Java || Java programs for Beginners

5 Simple Java Programs for Beginners

1.Program to print Hello World

public class Main

      {

             public static void main(String[] args)

              {

                    System.out.println("hello world!")

               }

        }

output: hello world!

2.Program to Add two numbers

public class Main

    {

        public static void main(String[] args)

            {

                int a = 5;

                int b = 10;

                System.out.println(a+b);

            }

    }

output: 15

3.Program to find a number is even or odd

public class Main

{

public static void main(String[] args)

{

int a = 5;

if( a%2 == 0)

    {

        System.out.println("number is even");

    }

else

   {

        System.out.println("number is odd");

    }

}

output: number is odd

4.Program to find factorial of a number

public class Main

    {

        public static void main(String[] args)

            {

                int a = 5;

                int fact = 1;

           for(int i = 1; i < = 5; i++)

           {

                fact =  fact *  i;             

            }

System.out.println(fact);

    }

output : 120

5.Program to swap values two numbers using third variable

public class Main

    {

        public static void main(String[] args)

            { 

int a = 5; int b = 10;

int c = a;

int a = b;

int b = c;

 

System.out.println("a = "+a+"  "+"b = "+b);

            }

    }

output : a = 10 b = 5