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🚀 Programming Example

Program to print the given number pattern
1
12
123
1234
12345

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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.
← Previous Print perfect square spiral number pattern1 2 3 4 5 620 21 22 23 24 719 32 33 34 25 818 31 36 35 26 917 30 29 28 27 1016 15 14 13 12 11

💻 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", j);
        }

        printf("\n");
    }

    return 0;
}

🖥 Program Output

Enter N: 5
1
12
123
1234
12345

📘 Explanation

Required knowledge

Basic C programming,?Loop

Logic to print the given number pattern 1

1
12
123
1234
12345

Logic to this pattern is pretty simple; to understand the logic, first have a careful eye on to the pattern for a minute and think the logic. You can observe that there are?N?number of rows (where?N?is the total number of rows to be printed). Each row exactly contains?i?number of columns (where?i?is the current row number). And for each row in each column?j?gets printed (where?j?is the current column number).
The step-by-step descriptive logic is:

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

Lets implement this logic.

← Previous Print perfect square spiral number pattern1 2 3 4 5 620 21 22 23 24 719 32 33 34 25 818 31 36 35 26 917 30 29 28 27 1016 15 14 13 12 11
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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.

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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.

📌 Topic Information
Subject C Programming Language
Chapter Loop control in C Language
Sub-Chapter For Loop in C Language

⚡ Quick Practice Flow

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  • Read the topic carefully
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