Write an expression that executes the loop while the user enters a number greater than or equal to 0.Note: These activities may test code with different test values. This activity will perform three tests, with userNum initially 9 and user input of 5, 2, -1, then with userNum initially 0 and user input of -17, then with userNum initially -1. See "How to Use zyBooks". .Also note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds, and report "Program end never reached." The system doesn't print the test case that caused the reported message.

In this solution in Java programming language a do.....while loop has been used to implement it
The condition while(userNum>=0); ensures that the user will continuously be prompted to enter a number as long as the number entered is greater or equals to 0.
See a complete program below That uses the scanner class and countinually prompts the user for input as long as the number entered is greater or equal to zero
The loop breaks once a number less than zero is entered by the user

import java.util.Scanner;

public class num3 {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

int userNum;

do {

System.out.println("Enter a number");

userNum = in.nextInt();

System.out.println("You entered "+userNum+" you are still in the loop");

}while(userNum>=0);

System.out.println("You are out of the loop now.... goodbye");

}