Complete Question:
Write a do-while loop that continues to prompt a user to enter a number less than 100, until the entered number is actually less than 100. End each prompt with a newline. Ex: For the user input 123, 395, 25, the expected output is:
Enter a number (<100):
Enter a number (<100):
Enter a number (<100):
Your number < 100 is: 25
Answer:
import java.util.Scanner;
public class num8 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n;
        do{
            System.out.println("Enter a number (<100):");
            n= in.nextInt();
        }while(n>100);
        System.out.println("Your number < 100 is: "+n);
    }
}
Explanation:
Using Java programming language
Import the scanner class to receive user input
create an int variable (n) to hold the entered value
create a do while loop that continuously prompts the user to enter a number less than 100
the condition is while(n>100) It should continue the loop (prompting the user) until a number less than 100 is entered.