Number pattern 14 in C

Write a C program to print the given number pattern using loop. How to print the given number pattern of m rows and n columns using for loop in C programming. Logic to print the given number pattern using for loop in C program.

Input rows: 5
Input columns: 5

12345
23455
34555
45555
55555

55555
45555
34555
23455
12345

Required knowledge

Basic C programming, Loop

Logic to print the given number pattern

Before we get into detail of printing these two patterns I assume that you all must be aware of basic number pattern printing, if not I recommend you to go through some previous number pattern to get yourself acquainted.

12345
23455
34555
45555
55555

Now, considering this pattern have an eye to this pattern carefully you will notice two separate patterns here. The two separate patterns are:

12345
2345-
345--
45---
5----

-----
----5
---55
--555
-5555

Now logic to print the both patterns separately is relatively easier then whole pattern at once.

1. Run an outer loop from 1 to max-column (where max-column is total number of columns in our case its 5).
2. Initialize the inner loop from the current row till max-column.
3. Inside inner loop print the current column.
4. Run another inner loop after the termination of loop stated in step 2. Initialize it from current row till 1. And print max-column inside this loop.

And you are done. Lets, now implement this on code.

Program to print the given number pattern

/**
 * C program to print number pattern
 */

#include <stdio.h>

int main()
{
    int rows, cols, i, j;

    /* Input rows and columns from user */
    printf("Enter number of rows: ");
    scanf("%d", &rows);
    printf("Enter number of columns: ");
    scanf("%d", &cols);

    for(i=1; i<=rows; i++)
    {
        for(j=i; j<=cols; j++)
        {
            printf("%d", j);
        }

        for(j=i; j>1; j--)
        {
            printf("%d", cols);
        }

        printf("\n");
    }

    return 0;
}

Enter number of rows: 5
Enter number of columns: 5
12345
23455
34555
45555
55555

Program to print the given number pattern reverse

/**
 * C program to print number pattern
 */

#include <stdio.h>

int main()
{
    int rows, cols, i, j;

    /* Input rows and columns from user */
    printf("Enter number of rows: ");
    scanf("%d", &rows);
    printf("Enter number of columns: ");
    scanf("%d", &cols);

    for(i=rows; i>=1; i--)
    {
        for(j=i; j<=cols; j++)
        {
            printf("%d", j);
        }

        for(j=i; j>1; j--)
        {
            printf("%d", cols);
        }

        printf("\n");
    }

    return 0;
}

Happy coding 😉