Java: Accepts an integer (n) and computes the value of n+nn+nnn

Last update on April 01 2025 10:51:20 (UTC/GMT +8 hours)

Compute n+nn+nnn

Write a Java program that accepts an integer (n) and computes the value of n+nn+nnn.

Sample Solution:

Java Code:

import java.util.Scanner;

public class Exercise44 {
    public static void main(String[] args) {
        int n;
        char s1, s2, s3;
        Scanner in = new Scanner(System.in);
        
        // Prompt the user to input a number.
        System.out.print("Input number: ");
        n = in.nextInt();
        
        // Display the number in a specific pattern.
        System.out.printf("%d + %d%d  + %d%d%d\n", n, n, n, n, n, n);
    }
}

Sample Output:

Input number: 5                                                        
5 + 55  + 555

Flowchart:

For more Practice: Solve these Related Problems:

• Modify the program to accept any number of repetitions.
• Write a program to compute the sum in reverse order.
• Compute the sum using a mathematical formula instead of concatenation.
• Write a program to compute n+nn+nnn+nnnn.

Java Code Editor:

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