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C Program to Print Pyramids and Patterns

In this example, you will learn to print half pyramids, inverted pyramids, full pyramids, inverted full pyramids, Pascal’s triangle, and Floyd’s triangle in C Programming.

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To understand this example, you should have the knowledge of the following C programming topics:


Here is a list of programs you will find in this page.

C Examples
Half pyramid of *
Half pyramid of numbers
Half pyramid of alphabets
Inverted half pyramid of *
Inverted half pyramid of numbers
Full pyramid of *
Full pyramid of numbers
Inverted full pyramid of *
Pascal’s triangle
Floyd’s triangle

Example 1: Half Pyramid of *

*
* *
* * *
* * * *
* * * * *

C Program

#include int main() { int i, j, rows; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = 1; i <= rows; ++i) { for (j = 1; j <= i; ++j) { printf("* "); } printf("\n"); } return 0; }

Example 2: Half Pyramid of Numbers

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

C Program

#include int main() { int i, j, rows; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = 1; i <= rows; ++i) { for (j = 1; j <= i; ++j) { printf("%d ", j); } printf("\n"); } return 0; }

Example 3: Half Pyramid of Alphabets

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

C Program

#include int main() { int i, j; char input, alphabet = 'A'; printf("Enter an uppercase character you want to print in the last row: "); scanf("%c", &input); for (i = 1; i <= (input - 'A' + 1); ++i) { for (j = 1; j <= i; ++j) { printf("%c ", alphabet); } ++alphabet; printf("\n"); } return 0; }

Example 4: Inverted half pyramid of *

* * * * *
* * * *
* * * 
* *
*

C Program

#include int main() { int i, j, rows; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = rows; i >= 1; --i) { for (j = 1; j <= i; ++j) { printf("* "); } printf("\n"); } return 0; }

Example 5: Inverted half pyramid of numbers

1 2 3 4 5
1 2 3 4 
1 2 3
1 2
1

C Program

#include int main() { int i, j, rows; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = rows; i >= 1; --i) { for (j = 1; j <= i; ++j) { printf("%d ", j); } printf("\n"); } return 0; }

Example 6: Full Pyramid of *

        *
      * * *
    * * * * *
  * * * * * * *
* * * * * * * * *

C Program

#include int main() { int i, space, rows, k = 0; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = 1; i <= rows; ++i, k = 0) { for (space = 1; space <= rows - i; ++space) { printf(" "); } while (k != 2 * i - 1) { printf("* "); ++k; } printf("\n"); } return 0; }

Example 7: Full Pyramid of Numbers

        1
      2 3 2
    3 4 5 4 3
  4 5 6 7 6 5 4
5 6 7 8 9 8 7 6 5

C Program

#include int main() { int i, space, rows, k = 0, count = 0, count1 = 0; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = 1; i <= rows; ++i) { for (space = 1; space <= rows - i; ++space) { printf(" "); ++count; } while (k != 2 * i - 1) { if (count <= rows - 1) { printf("%d ", i + k); ++count; } else { ++count1; printf("%d ", (i + k - 2 * count1)); } ++k; } count1 = count = k = 0; printf("\n"); } return 0; }

Example 8: Inverted full pyramid of *

* * * * * * * * *
  * * * * * * *
    * * * * *
      * * *
        *

C Program

#include int main() { int rows, i, j, space; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = rows; i >= 1; --i) { for (space = 0; space < rows - i; ++space) printf(" "); for (j = i; j <= 2 * i - 1; ++j) printf("* "); for (j = 0; j < i - 1; ++j) printf("* "); printf("\n"); } return 0; }

Example 9: Pascal’s Triangle

           1
         1   1
       1   2   1
     1   3   3    1
   1  4    6   4   1
 1  5   10   10  5   1

C Program

#include int main() { int rows, coef = 1, space, i, j; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = 0; i < rows; i++) { for (space = 1; space <= rows - i; space++) printf(" "); for (j = 0; j <= i; j++) { if (j == 0 || i == 0) coef = 1; else coef = coef * (i - j + 1) / j; printf("%4d", coef); } printf("\n"); } return 0; }

Example 10: Floyd’s Triangle.

1
2 3
4 5 6
7 8 9 10

C Program

#include int main() { int rows, i, j, number = 1; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = 1; i <= rows; i++) { for (j = 1; j <= i; ++j) { printf("%d ", number); ++number; } printf("\n"); } return 0; }
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