How do I make my program repeat according to certain circumstances?

Question

import java.util.Scanner;

public class MyFirstGame {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        Syste         


        

Answer 1

just put your code inside the do-while loop

Scanner scanner = new Scanner(System.in);

do
{
    System.out.println("Please Enter A Number: ");
    double s = scanner.nextDouble();

    double realerNumber = Math.round( Math.random() * 10 );

    System.out.println(realerNumber);

    if(s==realerNumber) {
        System.out.println("You Win!");
    } else {
        System.out.println("Try Again...");
    }
}
while(someCondition);

the someCondition can be for example a counter (if you want to play n times just set counter to n and decrease it every loop iteration then check if it is 0 in while) or some function checking if a key is pressed (like escape)

int n = 5;

do
{
    n--;
    ...
}
while(n > 0);

Answer 2

This will run forever, but it's the idea mentioned in the first comment

    ...
    Scanner scanner = new Scanner(System.in);
    while(true){ // add this after Scanner ... declaration
       ...
        } // end of existing else block
    } // end of while loop, so add this single brace
    ...

Answer 3

Use a while loop:

long realerNumber = Math.round(realNumber);
// first guess
long guess = scanner.nextLong();
while (guess != realerNumber) {
    System.out.println("Try Again...");
    // guess again
    guess = scanner.nextInt();
}

System.out.println("You Win!");

There is already a class to generate random numbers, you could use it:

// TODO: move to constant
int MAX = 10;
// nextInt(int n) generates a number in the range [0, n)
int randomNumber = new Random().nextInt(MAX + 1)