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C Program To Print Diamond Pattern

Last Updated : 10 Dec, 2024
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The Diamond Pattern is a symmetrical shape where the number of characters increases up to the centre and then decreases forming a diamond-like structure. It can be visualized as a full pyramid and an inverted full pyramid joined by their bases. In this article, we will learn how to print the Diamond Pattern using C program.

Diamond-Pattern

Program To Print Diamond Pattern

Star Pattern 
#include <stdio.h>

int main() {
    int n = 5;

    // First outer loop to iterator through each row
    for (int i = 0; i < 2 * n - 1; i++) {

        // Assigning values to the comparator according to
        // the row number
        int comp;
        if (i < n) comp = 2 * (n - i) - 1;
        else comp = 2 * (i - n + 1) + 1;

        // First inner loop to print leading whitespaces
        for (int j = 0; j < comp; j++)
            printf(" ");

        // Second inner loop to print stars *
        for (int k = 0; k < 2 * n - comp; k++) {
            printf("* ");
        }
        printf("\n");
    }
    return 0;
}
Number Pattern 
#include <stdio.h>

int main() {
    int n = 5;

    // First outer loop to iterator through each row
    for (int i = 0; i < 2 * n - 1; i++) {

        // Assigning values to the comparator according to
        // the row number
        int comp;
        if (i < n) comp = 2 * (n - i) - 1;
        else comp = 2 * (i - n + 1) + 1;

        // First inner loop to print leading whitespaces
        for (int j = 0; j < comp; j++)
            printf(" ");

        // Second inner loop to print stars *
        for (int k = 0; k < 2 * n - comp; k++) {
            printf("%d ", k + 1);
        }
        printf("\n");
    }
    return 0;
}
Alphabet Pattern 
#include <stdio.h>

int main() {
    int n = 5;

    // First outer loop to iterator through each row
    for (int i = 0; i < 2 * n - 1; i++) {

        // Assigning values to the comparator according to
        // the row number
        int comp;
        if (i < n) comp = 2 * (n - i) - 1;
        else comp = 2 * (i - n + 1) + 1;

        // First inner loop to print leading whitespaces
        for (int j = 0; j < comp; j++)
            printf(" ");

        // Second inner loop to print stars *
        for (int k = 0; k < 2 * n - comp; k++) {
            printf("%c ", k + 'A');
        }
        printf("\n");
    }
    return 0;
}


Output

        *           |           1           |           A
      * * *         |         1 2 3         |         A B C
    * * * * *       |       1 2 3 4 5       |       A B C D E
  * * * * * * *     |     1 2 3 4 5 6 7     |     A B C D E F G
* * * * * * * * *   |   1 2 3 4 5 6 7 8 9   |   A B C D E F G H I
  * * * * * * *     |     1 2 3 4 5 6 7     |     A B C D E F G
    * * * * *       |       1 2 3 4 5       |       A B C D E
      * * *         |         1 2 3         |         A B C
        *           |           1           |           A

Explanation:

  • Outer loop iterates through each row from 0 to 2 * n - 2 (as total 2 * n - 1 rows).
  • comp determines the number of leading spaces based on the current row number.
    • For the first half (i < n): comp = 2 * (n - i) - 1.
    • For the second half (i >= n): comp = 2 * (i - n + 1) + 1.
  • First inner loop prints leading white spaces in each row.
  • Second inner loop iterates through the columns in the row to print * star.
  • After completing a row, printf("\n") moves to the next line.

M

mukulsomukesh
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