How to make a program run multiple times.

[kunimaro15689]

I have made a basic math game that asks you questions and tells you if you have answered them correctly or incorrectly. The game runs great! The thing is that it asks you a question one time and after you answer you have to run the program again. I want to get the program to ask ten questions. After that I want to figure out a scoring system for it but the first step is to get it to ask my ten questions. Here is my code.

package pkgnew;

import java.util.Scanner;
import java.util.Random;

public class New {

public static void main(String args[]) {

//Declare and construct variables
Random randomnum = new Random();
int fnum, snum, answer;
int mathnumber = randomnum.nextInt(20);
int newnumber = randomnum.nextInt(20);

//Declare and construct variables of math problem
fnum = mathnumber;
snum = newnumber;
answer = fnum + snum;

//Output of math problem
System.out.print(fnum);
System.out.print("+");
System.out.println(snum);

Scanner serena = new Scanner(System.in);
int userAnswer = serena.nextInt();

//If user input = answer display "correct"
if (userAnswer == answer) {
System.out.println("Correct!");

//If user input does not = answer display "wrong" and correct answer
} else {
System.out.print("Wrong!");
}

}
}

[jashburn]

Please wrap your code with [code] tags so that it is easier to read, e.g.,
[code=java]
// your code here
[/code]

It preserves formatting and provides syntax highlighting, e.g.,

// your code here

Study the for statement at The for Statement (The Java™ Tutorials > Learning the Java Language > Language Basics). It'll allow you to loop through your code how ever many times you want. After that, you can declare a variable outside the loop, and update the value of the variable with the score inside the loop.

[kunimaro15689]

Thanks. I fixed my code in a new thread where I was more specific. Using this method I would have to use everything as an integer for the loop to work? I cant make the entire question an integer so I am confused when it comes to how to do it.

[GregBrannon]

Please don't post multiple threads on the same topic. If you decide you need to be more clear, post the clarification in your original thread rather than starting a new one.

Clarify your latest question. No idea what you're asking.

[xPhish]

When you want your code to run a certain amount of times, you use the For loop. Here's an example,

for(int i = 0; i < 10; i++)
{
    //code in here
}

You can also ask the user how many times they want to run it.. Example:

System.out.println("How many times would you like to run this program?");
int x = scan.nextInt();
for(int i = 0; i < x; i++)
{
     //code here
}

When you don't know how many times the user wants to run your code you can use a while loop.. Example:

String answer = "y";
while(answer.equalsIgnoreCase("y")) //this just means as long as the variable "answer" equals "y" it will continue to loop
{
    //other code
    System.out.println("\nDo you want to run this application again?(y or n)");
            answer = scan.nextLine();
            answer = answer.substring(0,1);
}

Hope this helps!
Horray for first post!

[kunimaro15689]

Thanks for your help xPhish! It helped a lot!