Cracking the Java Stdin and Stdout Challenge on HackerRank

Solving the HackerRank Challenge: Reading and Printing Integers

Welcome back to my HackerRank adventure! In this blog post, I'll be sharing my experience of tackling a simple yet fundamental challenge on HackerRank that involves reading integers from stdin and printing them to stdout. This challenge is a great way to practice input and output handling in Java. Let's dive right into it!

The Challenge: Reading and Printing Integers

The challenge is straightforward: we are given several lines of input, each containing a single integer, and our task is to read these integers and print each of them on a new line. The goal is to become comfortable with reading input from stdin (standard input) and writing output to stdout (standard output) in Java.

Understanding the Problem

Before we start writing code, let's take a moment to understand the problem:

• Input: We have several lines of input, each containing a single integer.
• Output: Our task is to print each of these integers on a new line.

My Approach

To tackle this challenge, I used the Scanner class in Java, which is a popular way to read input from stdin. Here's a summary of the approach I followed:

1. Importing the Scanner Class: I started by importing the Scanner class from the java.util package.
2. Creating Scanner Object: Next, I created a Scanner object named scan and specified System.in as the input stream.
3. Reading Integers: I used the nextInt() method of the Scanner class to read the integers.
4. Printing Integers: Finally, I printed each integer on a new line using System.out.println().

The Java Code

Testing and Conclusion

After writing the code, I tested it with different inputs to ensure that it correctly read and printed the integers on separate lines. The code worked as expected, and I successfully completed this HackerRank challenge.

This challenge served as a valuable practice in input and output handling in Java. It's a fundamental skill for any Java programmer, and I encourage you to give it a try if you're new to these concepts.

Stay tuned for more HackerRank challenges and coding adventures. If you have any questions or insights to share, please feel free to leave a comment below. Happy coding!