Print the given number pattern 1 12 123 1234 12345

🚀 Programming Example

Print the given number pattern

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💻 Practical Program

📘 Step Learning

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 in C program using loop.

💻 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 spaces
        for(j=1; j<=N-i; j++)
        {
            printf(" ");
        }

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

        printf("\n");
    }

    return 0;
}

🖥 Program Output

📘 Explanation

The above pattern is very much similar to the previous pattern we just printed. We only need to add logic to print trailing spaces that should be printed before the number gets printed.
If you hover your mouse on to the pattern you can see or count total spaces per row and can also think of logic to print the spaces. If you can notice, there are exactly?N - i?spaces per row (where?N?is the total number of rows to be printed and?i?is the current row number.
The step-by-step descriptive logic to print spaces is:

To print spaces, run an inner loop from 1 to?N - i. Inside this loop print single blank space.

Lets now code this.

🎯 How to learn from this example

First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.

🔥 Practice suggestion

Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.

Print the given number pattern
1 12 123 1234 12345

💻 Program Code

🖥 Program Output

📘 Explanation

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