Write a java program to swap a two integer without using a Temporary Third variable

Program :

class Swap1

{

    public static void main(String[] args) {

       

        int x = 5 ;

        int y = 7 ;

        x = x +  y ;

        y =  x - y ;

        x = x - y ;

        System.out.println("After Swapping " +x);

        System.out.println("Before Swapping " +y);

    }

}

Output :

write a java program to check the given No is Prime or Not.

Program :

class Prime

{

public static void main(String[] args) {

int n = 7 , i = 1 , count = 0 ;

do

{

if (n % i == 0) 

count++ ;

i++ ;

}while( i<=n);

if (count == 2 ) 

System.out.println("It is a Prime Number ");

else

System.out.println("It is not a Prime Number ");

          }

}

Output :

write a java program to check the given number is palindrome or not.

Program :

class Palindrome

{

public static void main(String[] args) {

int n = 123 ;

int p = n , s = 0 ;

while(n>0)

{

int z  = n%10 ;

s = (s*10) + z ;

n = n/10 ;

}

if (s == p)

System.out.println("It is a Palindrome " +s);

System.out.println("It is not a Palindrome " +s);

}

}

Output :

write a java program to find the greatest number among 2 digit.

program :

class Greatest

{

public static void main(String[] args) {

int x = 5 ;

int y = 7 ;

if (x > y ) {

System.out.println(" Greatest Number is " +x);

}

else{

System.out.println("Greatest Number is " +y);

}

}

}

Output :

write a Java program to print Fibonacci Series

Program :

class Fibonacci

{

public static void main(String[] args) {

int fs = 10 , a = 0 ,b =1 , c , i ;

System.out.println("Fibonacci Series");

for (i = 1;i<=fs-2 ;i++ )

                 {

                       c= a+b ;

System.out.println(c);

a= b ;

b = c ;

}

}

}

Output :

write a java program to print star design.

program :

class Design
{
public static void main(String args [])
{

System.out.println("* * * * * *");

System.out.println("* * * * * ");

System.out.println("* * * * ");

System.out.println("* * * ");

System.out.println("* * ");

System.out.println("* ");

}
}

Output :

write a java program to create character variables color , and output red if variable r = Red , b = Blue , g = Green else output is ERROR using SwitchCase.

program :

class Comparison
{
public static void main(String[] args) {

char color = 'r' ;
switch(color)
{
case 'R':
System.out.println(" Red ");
break ;

case 'B' :
System.out.println(" Blue");
break ;

case 'G' :
System.out.println("Green") ;
break ;

default :
System.out.println(" Error") ;
break ;
}
}
}

Output :

Write a Java program to calculate a square and cube of Integer

Program :

class Square
{
public static void main(String[] args) {

int x = 2 ;
int sqrt ;

sqrt = x*x ;
int cube ;
cube = x*x*x ;

  System.out.println(" Square is "+sqrt);

  System.out.println("Cube is "+cube);
}
}

Output :