how would you make the user enter a number perform operation in do while loop then repeat instead of quitting

Question

3.00/5 (2 votes)

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JavaScript

import java.util.Scanner;


public class Lab5 {

    
   
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner in = new Scanner(System.in);
            System.out.println("How big is the multiplication");
		int choice = in.nextInt();
              
               do
               {
                while(choice>=1 && choice<=20)
                  {
                System.out.print("\nX\t");
          for(int x = 1; x <= choice; x++)
            {   
                    System.out.print(x+"\t"); 
                     
            }
          System.out.print("\n\t");
                     for( int l=1; l<=choice; l++)
                     {
                System.out.print("-------");
                System.out.print("");
                     }
            
            
            
             
          for(int i=1; i<=choice; i++)
				{
					System.out.print(i + "|\t");
					for(int j=1; j<=i; j++)
					{
						System.out.print(j*i + "\t");
                                               
					}
					System.out.println();
                                       
					
				}
          
                                }
              
               
   }while(choice>=1 && choice<=20);
         
            
             
            }
              
}

Posted 5-Oct-12 19:35pm

diego14567

Updated 5-Oct-12 20:53pm

TorstenH.

v4

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2 solutions

Solution 2

I gave you the answer here[^], why not try it?

Posted 5-Oct-12 22:56pm

Richard MacCutchan

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TorstenH. · Accepted Answer · 2012-10-05T21:02:00

Folow up to first question:

anyone know why this code keeps going in an infinite loop[^]

This Question:
You will have to make a decision - let the loop run or stop it.
That can be done by a if/else. Using the keyword break will cause the loop to break and stop.

Java

System.out.println("Enter number");
Scanner input = new Scanner( System.in ); 
int iDecision = input.nextInt();
if(0 == iDecision){ // do something when number is 0
  // do something e.g. ....
  break; // ...loop breaks
}
else{ // optional
 // do other thingy
}

EDIT:
I deleted Question number 3 for this homework. Please ask here to keep the information together and our programming suggestions in line - we might confuse you otherwise with contrasting suggestions.

while loop

You can make a while loop that runs infinit: