CODEWITHSUNDEEP
javaloops
Supdawg
Supdawg

Reputation: 61

Creating a loop with a Scanner

I am trying to make it so a scanner takes in the number the user enters then prints hello world for how many times the user has imputed that number using a while loop. I created a Scanner for x, I am having trouble finding out how to properly execute the loop though.

// import Scanner to take in number user imputs
import java.util.Scanner;

public class HelloWorld {
    public static void main(String[] args){
        // create a scanner class that takes in users number
        Scanner scan = new Scanner(System.in);
        System.out.println("Please enter a whole number: " );
        // use x as the number the user entered
        int x = scan.nextInt();
        while ( ){
           System.out.println("Hello World!");
        }
    }
}

Upvotes: 3

Views: 483

Answers (5)

Sneh
Sneh

Reputation: 3757

You could use a while loop such as the following one:

Scanner scanner = new Scanner(System.in);
int x = scanner.nextInt();
while (x > 0){
    // do something
    x--;
}

Alternatively you could also use a for loop; this is usually the best choice if you know how often the loop will be called before it starts.

Upvotes: 0

Deepanshu J bedi
Deepanshu J bedi

Reputation: 1540

you have to define a true conditon in while. 

 while (x > 0)//true condition.

How many time will you like to print your print statement.

 x--;//decrements the value by 1

Upvotes: 2

Thusitha Thilina Dayaratne
Thusitha Thilina Dayaratne

Reputation: 5712

        Scanner scan = new Scanner(System.in);
        System.out.println("Please enter a whole number: " );
        // use x as the number the user entered
        int x = scan.nextInt();
        while (x > 0){
           System.out.println("Hello World!");
           x--;
        }

Upvotes: 3

Mureinik
Mureinik

Reputation: 312404

The easiest way would be to use a for loop:

int x = scan.nextInt();
for (int i = 0; i < x; ++i) {
    System.out.println("Hello World!");
}

If you absolutely have to use a while loop, you can simulate the same behavior by declaring a counter variable (i, in this case) yourself:

int x = scan.nextInt();
int i = 0;
while (i < x);
    System.out.println("Hello World!");
    ++i;
}

Upvotes: 2

Jean Logeart
Jean Logeart

Reputation: 53879

Simply:

for(int counter = 0 ; counter < x ; counter++) {
   System.out.println("Hello World!");
}

The part reading x is perfectly correct.

Upvotes: 1

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