Java Input & Output (Scanner Explained With Examples)

 Java Input & Output (Scanner Explained With Examples)

To build interactive Java programs, we must take input from users.

✅ Input in Java (Scanner Class)

We use Scanner to read input:

import java.util.Scanner;

public class Main {

  public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);

    

    System.out.print("Enter your name: ");

    String name = sc.nextLine();

    

    System.out.print("Enter your age: ");

    int age = sc.nextInt();

    

    System.out.println("Welcome " + name + "! You are " + age + " years old.");

  }

}

✅ Output in Java

We use:

• System.out.print() — prints text

• System.out.println() — prints text + new line

🎯 Summary

Feature	Method
Input	Scanner class
Display output	print / println

Learn with Funny Story 😅:

😂 The Story of Ramu and the Scanner

Ramu wanted to learn Java.
But there was one big problem:

👉 Java wanted input… and Ramu wanted output!

So one day, Ramu sat in front of his laptop and asked:

“Java bhai… how do I take input from the user?”

Java replied:

“Call my friend… Scanner!”

So Ramu wrote:

Scanner sc = new Scanner(System.in);

Suddenly a tiny character popped out of the laptop wearing glasses.

Scanner: “Hello! Tell me what you want me to read.”
Ramu: “Bro, just read whatever users type!”
Scanner: “Okay! Just call me with nextLine().”

Ramu typed something…
Scanner grabbed it…
Java printed it…

System.out.println("You entered: " + sc.nextLine());

Ramu jumped and shouted:

“AREY! This is magic!”

Scanner adjusted his tiny glasses and said:

“Magic? No no… I just scan things.”

Ramu nodded proudly.
Java smiled silently.
And the output appeared perfectly.

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Keep practicing — coding gets easier every day 💪🔥

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