C Program To Print Character Pyramid Pattern

Last Updated : 11 Dec, 2024

Pyramid patterns is a classic logical programming exercise where a triangular looking pattern is printed by treating the output screen as a matrix and printing a given character. In this article, we will explore how to print various alphabet pyramid patterns using C program.

Half Pyramid Pattern

Half Pyramid Pattern is a triangular pattern where each row starts with 'A' and increases by one character per row. Characters are aligned to the left resembling a right-angled triangle with the hypotenuse facing right.

#include <stdio.h>

int main() {
    int n = 5;

    // Outer loop for printing rows
    for (int i = 1; i <= n; i++) {

        // Inner loop for printing alphabets in each row
        for (int j = 1; j <= i; j++) {
            printf("%c ", 'A' + j - 1);
        }
        printf("\n");
    }

    return 0;
}

Output

A 
A B 
A B C 
A B C D 
A B C D E

Inverted Half Pyramid Pattern

Inverted half pyramid pattern is nothing but the half pyramid pattern flipped vertically.

#include <stdio.h>

int main() {
    int n = 5; 

    // Outer loop for printing rows
    for (int i = n; i >= 1; i--) {

        // Inner loop for printing 
        // the character in each row
        for (int j = 0; j < i; j++)
            printf("%c ", 'A' + j);
        printf("\n");
    }

    return 0;
}

Output

A B C D E 
A B C D 
A B C 
A B 
A

Full Pyramid Pattern

The Full Pyramid Pattern looks like an equilateral triangle pattern where each row increases the number of characters by 2 from the top to the bottom row.

#include <stdio.h>

int main() {
    int n = 5;

    // Outer loop to print all rows
    for (int i = 0; i < n; i++) {

        // First inner loop 1 to print white spaces
        for (int j = 0; j < 2 * (n - i) - 1; j++)
            printf(" ");

        // Second inner loop 2 to print alphabets
        for (int k = 0; k < 2 * i + 1; k++)
            printf("%c ", 'A' + k);
        printf("\n");
    }
    return 0;
}

Output

         A 
       A B C 
     A B C D E 
   A B C D E F G 
 A B C D E F G H I

Hollow Pyramid Pattern

The Hollow Pyramid Pattern forms a full pyramid where only the outer edges are filled with characters and the inner part of the pyramid is empty, creating a hollow space inside the shape.

#include <stdio.h>

int main() {
    int n = 5;

    // Outer loop to iterate through each row
    for (int i = 0; i < n; i++) {

        // First inner loop to print leading whitespaces
        for (int j = 0; j < 2 * (n - i) - 1; j++)
            printf(" ");

        // Second inner loop to print alphabets and inner
        // whitespaces
        for (int k = 0; k < 2 * i + 1; k++) {
            if (k == 0 || k == 2 * i || i == n - 1)
                printf("%c ", k + 'A');
            else
                printf("  ");
        }
        printf("\n");
    }
    return 0;
}

Output

         A 
       A   C 
     A       E 
   A           G 
 A B C D E F G H I

Diamond Pyramid Pattern

The Diamond Pyramid Pattern can be considered as made up of two halves. The top half is a regular pyramid with increasing characters and the bottom half is an inverted pyramid with decreasing characters forming a diamond-like shape.

#include <stdio.h>
int main() {
    int n = 5;

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

        // Assigning values to the comp to distinguish
      	// between first half and second half
        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 alphabet
        for (int k = 0; k < 2 * n - comp; k++)
            printf("%c ", k + 'A');
        printf("\n");
    }
    return 0;
}

Output

         A 
       A B C 
     A B C D E 
   A B C D E F G 
 A B C D E F G H I 
   A B C D E F G 
     A B C D E 
       A B C 
         A

C Program to Print Right Half Pyramid Pattern

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Article Tags :

C Program To Print Character Pyramid Pattern

Half Pyramid Pattern

Inverted Half Pyramid Pattern

Full Pyramid Pattern

Hollow Pyramid Pattern

Diamond Pyramid Pattern

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