Java Programming for Complete Beginners - Java 16 - Step 08 - Do While Loop in Java - an Example - Cube While User Enter

The video tutorial explains how to create a simple Java program that repeatedly asks the user for a number and prints its cube until a negative number is entered. It covers the use of the 'do while' loop, handling user input with the Scanner class, and optimizing code by minimizing object creation. The tutorial also addresses edge cases and ensures the program runs efficiently, providing a practical example of using loops in Java.

What is the main goal of the program discussed in the video?

• To find the factorial of a number

• To calculate the cube of a number until a negative number is entered

• To print numbers in reverse order

• To calculate the square of a number

Which Java class is used to get user input in the program?

• BufferedReader

• FileReader

• Scanner

• InputStream

Why is a do-while loop used instead of a while loop in this program?

• To ensure the question is asked at least once

• To make the program run faster

• To handle exceptions more effectively

• To reduce memory usage

What condition is checked in the do-while loop to continue asking for input?

• If the number is odd

• If the number is even

• If the number is greater than or equal to zero

• If the number is less than zero

What is the initial value assigned to the 'number' variable before entering the loop?

• -1

• 10

• 0

• 1

What message is displayed when the user enters a negative number?

• Error: Negative number

• Thank you, have fun

• Try again!

• Goodbye!

What is the purpose of moving the scanner initialization outside the loop?

• To reduce the number of objects created

• To increase the number of objects created

• To ensure the scanner is only used once

• To make the code more complex