How to write a menu driven program to print the design according to users choice

Question

(a)1 2 3 4 5 (b) 5 5 5 5 5
1 2 3 4 4 4 4 4
1 2 3 3 3 3
1 2 2 2
1 1

Answer 1

Hi mam....you can use switch case for menu driven program

import java.util.Scanner;
public class Main
{
public static void main(String args[])
{
Scanner input=new Scanner(System.in);
System.out.println("enter 1 for first pattern, enter 2 for second pattern, and enter 3 for exit");
for(;;)
{
System.out.print("enter your choice : ");
int choice=input.nextInt();
switch(choice)
{
case 1:for(int i=5;i>=1;i--)
{
for(int j=1;j<=i;j++)
{
System.out.print(j);
}
System.out.println();
}
break;
case 2:for(int i=5;i>=1;i--)
{
for(int j=1;j<=i;j++)
{
System.out.print(i);
}
System.out.println();
}
break;
case 3:System.exit(0);
break;
default:System.out.println("invalid choice");
}
}
}
}