Solving a Java Problem: Countdown Rocket

  • MHB
  • Thread starter lypena35
  • Start date
  • Tags
    Java Rocket
In summary, the conversation is about a person seeking help with a Java problem and someone providing a solution for a code that prints a countdown and "Blastoff!" using a for loop. The code is given and a minor error is pointed out. The conversation ends with the person expressing gratitude for the help.
  • #1
lypena35
18
0
Hello,
I am stuck on a Java problem in my textbook. Can anyone help me? I have tried many variations to no avail thank you.

Question:Write code that prints: userNum ... 2 1 Blastoff! Your code should contain a for loop. Print a newline after each number and after Blastoff!. Ex: userNum = 3 outputs:
3
2
1
Blastoff!

My code:import java.util.Scanner;

public class CountdownRocket {
public static void main (String [] args) {
int userNum = 0;
int i = 0;

userNum = 3;

for(i=0;i<=userNum;--i){
System.out.println(userNum);
if(i==0){
System.out.println("Blastoff!");
}
}

return;
}
}
 
Technology news on Phys.org
  • #2
The loop should be like this.

Code:
    for (i = userNum; i > 0; --i){
      System.out.println(i);
      if (i == 1) {
        System.out.println("Blastoff!");
      }
    }

Having [m]return;[/m] at the end of [m]main()[/m] is not necessary.
 
  • #3
That worked thank you very much! I really appreciate the help!
 
Last edited:

Related to Solving a Java Problem: Countdown Rocket

What is the Countdown Rocket Java problem?

The Countdown Rocket Java problem is a coding challenge in which a program must be created using the Java programming language to simulate a countdown for a rocket launch.

What are the steps for solving the Countdown Rocket Java problem?

The steps for solving the Countdown Rocket Java problem are as follows:

  1. Create a class for the rocket countdown program.
  2. Declare and initialize variables for the countdown time and launch message.
  3. Implement a loop to count down the time and display the current time during each iteration.
  4. Add conditions to display different messages depending on the countdown time.
  5. Run the program and test for any errors or bugs.

What are some common challenges when solving the Countdown Rocket Java problem?

Some common challenges when solving the Countdown Rocket Java problem include:

  • Understanding the logic and syntax of the Java programming language.
  • Implementing the correct loop and conditions to display the countdown and messages.
  • Handling any potential errors or bugs in the code.

How can I make my Countdown Rocket Java program more efficient?

To make your Countdown Rocket Java program more efficient, you can:

  • Use appropriate data types and variables to optimize memory usage.
  • Implement error handling and debugging techniques to identify and fix any issues in the code.
  • Refactor your code to eliminate any unnecessary or redundant steps.

Are there any resources available to help me solve the Countdown Rocket Java problem?

Yes, there are many resources available to help you solve the Countdown Rocket Java problem. These include:

  • Online tutorials and guides on Java programming and problem-solving techniques.
  • Java programming forums and communities where you can ask for assistance and advice.
  • Books and other reference materials on Java and coding challenges.

Similar threads

  • Programming and Computer Science
Replies
1
Views
6K
  • Programming and Computer Science
Replies
2
Views
8K
  • Programming and Computer Science
Replies
3
Views
10K
  • Programming and Computer Science
Replies
8
Views
1K
  • Programming and Computer Science
Replies
8
Views
1K
  • Programming and Computer Science
Replies
2
Views
12K
  • Programming and Computer Science
Replies
28
Views
29K
  • Programming and Computer Science
Replies
2
Views
845
  • Programming and Computer Science
Replies
3
Views
836
  • Programming and Computer Science
Replies
3
Views
2K
Back
Top