Rectangle Using Descending Numbers

Solution

C

The source code for the C program that prints rectangles using descending numbers is as follows:

#include<stdio.h>

int main() {
    printf("Enter the row size: ");
    int row_size, output, input;
    scanf("%d", &row_size);
    for(output=row_size; output>=1; output--){
      for(input=row_size; input>=1; input--){
          printf("%d", input);
    }
    printf("\n");
  }
}

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Output:

C++

The source code for the C++ program that prints rectangles using descending numbers is as follows:

#include<iostream>
using namespace std;

int main() {
    cout<<"Enter the row size: ";
    int row_size, output, input;
    cin>>row_size;
    for(output=row_size; output>=1; output--){
      for(input=row_size; input>=1; input--){
          cout<<input;
    }
    cout<<"\n";
  }
}

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Output:

Python

The source code for the Python program that prints rectangles using descending numbers is as follows:

print("Enter the row size: ")

row_size=int(input())
for output in range(row_size, 0, -1):
    for i in range(row_size, 0, -1):
        print(i, end="")

    print("\r")

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Output:

Java

The source code for the Java program that prints rectangles using descending numbers is as follows:

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner cs=new Scanner(System.in);
        System.out.println("Enter the row size:");
        int row_size, output, input;
        row_size=cs.nextInt();
        for(output=row_size; output>=1; output--) {
            for(input=row_size; input>=1; input--)
                System.out.print(input);
            
            System.out.println();
        }
        cs.close();
    }
}

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Output:

Frequently Asked Questions

What are rectangles using descending numbers?

This is a simple pattern with the digits in a row repeated in decreasing order in the rectangular pattern.
For instance, 
321
321
321

What is the time complexity for rectangles using descending numbers in C++? 

The time complexity for rectangles using descending numbers is O(N²) as we're iterating through two nested for loops, each of which has a range of N to 0.

When one loop is within the other loop, what do we call it?

One loop within another loop is referred to as a "nested loop".

What is the purpose of print("\r") in the Python code?

"\r" moves the cursor to the beginning of the line and then resumes normal text production.

Is it possible to enter a negative number?

No, we are not able to enter negative numbers since the number must be non-negative due to the problem constraint.

Conclusion

In this blog, we learned about the concepts of rectangles using descending numbers patterns in various languages like C, C++, Python and Java.

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