Question

Integer userNumber is read from input. Write a while loop that multiplies userNumber by 4, updating userNumber with the product, and outputs the updated userNumber, followed by a newline. The loop iterates until userNumber is greater than or equal to 40.

Ex: If the input is 25, then the output is:

100

import java.util.Scanner;

public class ProductCalculator {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
int userNumber;

userNumber = scnr.nextInt();
while(userNumber >= 40){
userNumber = userNumber * 4;
System.out.println(userNumber);
}
Java. What am I doing wrong? It's not giving an output.

}
}

Answer 1

Change this line;

• while(userNumber >= 40)

with;

• while(userNumber <= 40)

The loop will never start because userNumber is not already greater than 40.