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Programming Example

Program to print the given number pattern
5
44
333
2222
11111

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Write a C program to print the given number pattern using loop. How to print the given triangular number pattern using for loop in C programming. Logic to print the given number pattern using for loop in C program.

Program Code

/**
 * C program to print number pattern
 * www.atnyla.com
 */

#include <stdio.h>

int main()
{
    int i, j, N;

    printf("Enter N: ");
    scanf("%d", &N);

    for(i=1; i<=N; i++)
    {
        // Logic to print numbers
        for(j=1; j<=i; j++)
        {
            printf("%d", (N - i + 1));
        }

        printf("\n");
    }

    return 0;
}

Output

Enter N: 5
5
44
333
2222
11111

Explanation

Required knowledge

Basic C programming, Loop

Logic to print the given number pattern 1

 

5
44
333
2222
11111

 

To get the logic of this pattern I recommend you to carefully have an eye to the pattern. There are Nnumber of rows (where N is the total number of rows to be printed) and each row contains exactly i number of columns (where i is the current row number). Now for each column the value gets printed is N - i + 1.
Step-by-step descriptive logic:

  1. To iterate through rows, run an outer loop from 1 to N.
  2. To print the columns, run an inner loop from 1 to i (where i is the current row number). Inside this loop print the value of N - i + 1.

And you are done, lets write down its code.

How to learn from this program

First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.