🔷 C Pattern Program: Diagonal Number Pattern

#include <stdio.h>

int main()
{
    int num;
    printf("Enter the number:\n");
    scanf("%d", &num);
    
    for (int i = 0; i < num; i++)
    {
        for (int j = 0; j < num; j++)
        {
            if (j == i)
                printf("%d", i + 1);
            else if (j == num - 1 - i)
                printf("%d", num - i);
            else
                printf(" ");
        }
        printf("\n");
    }

    return 0;
}
  

📘 Explanation:

This C program prints a square pattern with two diagonal lines:

🔹 On the **main diagonal** (from top-left to bottom-right), it prints i+1 (increasing number).
🔹 On the **anti-diagonal** (from top-right to bottom-left), it prints num - i (decreasing number).
🔹 All other positions are filled with spaces to maintain the structure.
🔹 The result is a visually symmetric pattern based on the input size.

🔍 Sample Output:

Enter the number:
5
1   5
 2 4 
  3  
 2 4 
1   5
    

🏷️ Keywords:

C pattern printing, diagonal number pattern, matrix pattern in C, double diagonal number pattern, C loop-based programs