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In this tutorial, we will learn and code many alphabet patterns in C programming language. However, in this tutorial, we will create a pyramid pattern using characters in C using for loop. So you may go through the following topic in C.

• for loop in C

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C Alphabet Pattern program 1: Full Pyramid Pattern of Alphabets

Enter the no. of rows: 5
     A 
   A B 
  A B C 
 A B C D 
A B C D E 

Source Code:

#include <stdio.h>

void main()
{
  int rows, i, j, k;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  // ASCII value of alphabet 'A'
  int alphabet = 65;

  for (i = 0; i <= rows - 1; i++)
  {
    for (j = rows - 1; j > i; j--)
      printf(" ");

    for (k = 0; k <= i; k++)
      printf("%c ", (char)(alphabet + k));

    printf("\n");
  }

  getch();
}

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C Alphabet Pattern program 2: Inverted Full Pyramid Pattern of Alphabets

Enter the no. of rows: 5
 A B C D E 
  A B C D 
   A B C 
    A B 
     A

Source Code:

#include <stdio.h>

void main()
{
  int rows, i, j, k;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  // ASCII value of alphabet 'A'
  int alphabet = 65;

  for (i = 0; i <= rows - 1; i++)
  {
    for (int j = 0; j <= i; j++)
      printf(" ");

    for (k = 0; k <= rows - 1 - i; k++)
      printf("%c ", (char)(alphabet + k));

    printf("\n");
  }

  getch();
}

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C Alphabet Pattern program 4:

Another full pyramid with a different pattern.

Enter the no. of rows: 5
       A
      B B
    C C C
   D D D D
  E E E E E
 F F F F F F

Source Code:

#include <stdio.h>

void main()
{
  int rows, i, j, k;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  // ASCII value of alphabet 'A'
  int alphabet = 65;

  for (i = 0; i <= rows; i++)
  {
    for (j = 1; j <= rows - i; j++)
      printf(" ");

    for (k = 0; k <= i; k++)
      printf(" %c", (char)(i + alphabet));

    printf("\n");
  }

  getch();
}

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C Alphabet Pattern program 5:

Enter the no. of rows: 5
A
B A B
C B A B C
D C B A B C D
E D C B A B C D E

Source Code:

#include <stdio.h>

void main()
{
   int rows, i, j;

   printf("Enter the no. of rows: ");
   scanf("%d", &rows);

   for (i = 1; i <= rows; i++)
   {
      for (j = 1; j <= rows - i; j++)
         printf("  ");

      for (j = i; j > 0; j--)
         printf(" %c", (char)(j + 64));

      for (j = 2; j <= i; j++)
         printf(" %c", (char)(j + 64));

      printf("\n");
   }
}

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C Alphabet Pattern program 6:

Enter the no. of rows: 6
A
ABA
ABCBA
ABCDCBA
ABCDEDCBA
ABCDEFEDCBA

Source Code:

#include <stdio.h>

void main()
{
   int rows, i, j;

   printf("Enter the no. of rows: ");
   scanf("%d", &rows);

   for (i = 1; i <= rows; i++)
   {
      for (j = 1; j <= rows - i; j++)
         printf(" ");

      for (j = 1; j <= i; j++)
         printf("%c", (char)(j + 64));

      for (j = i - 1; j >= 1; j--)
         printf("%c", (char)(j + 64));

      printf("\n");
   }
}

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C Alphabet Pattern program 7:

Enter the no. of rows: 5
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

Source Code:

#include <stdio.h>

void main()
{
   int rows, i, j, l = 1, k;

   printf("Enter the no. of rows: ");
   scanf("%d", &rows);

   for (i = rows; i >= 1; i--)
   {
      for (j = 1; j <= l; j++)
         printf("  ");

      for (k = 1; k <= (2 *i - 1); k++)
         printf("%c ", 'A' + k - 1);

      l++;
      printf("\n");
   }
}

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C Alphabet Pattern program 8: Inverted Pyramid pattern using while loop

Enter the no. of rows: 5
A B C D E D C B A
A B C D C B A
A B C B A
A B A
A

Source Code:

#include <stdio.h>

void main()
{
   int rows, i, j, l = 1, k;

   printf("Enter the no. of rows: ");
   scanf("%d", &rows);

   i = rows;
   while (i >= 1)
   {
      j = 1;
      while (j <= rows - i)
      {
         printf("  ");
         j++;
      }

      j = 1;
      while (j <= 2 *i - 1)
      {
         if (j <= i)
         {
            printf("%c", (char)(j + 64));
            printf(" ");
         }
         else
         {
            printf("%c", (char)(2 *i - j + 64));
            printf(" ");
         }
         j++;
      }

      i--;
      printf("\n");
   }
}

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In this tutorial, we will write a C program to print a rectangular star pattern. You may go through the following topic on C first.

• for loop in C

Rectangle Star Pattern in C

The program asks for the number of rows and columns that a user wants and prints the result.

#include <stdio.h>

int main()
{
  int i, j, rows, col;

  printf("Enter number of rows: ");
  scanf("%d", &rows);

  printf("Enter number of columns: ");
  scanf("%d", &col);

  for (i = 1; i <= rows; i++)
  {
    for (j = 1; j <= col; j++)
      printf("* ");

    printf("\n");
  }

  return 0;
}

Enter number of rows: 4
Enter number of columns: 7
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *

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In this tutorial, we will write a C program to print a square pattern of any characters. Before that, you may go through the following topics in C.

• for loop in C

Square pattern of character in C

The program simply asks the user to enter the character that you want to print and the side of a square that is to be printed. And using that information inside a for loop, it prints the result.

#include <stdio.h>

int main()
{
  int i, j, rows;
  char ch;

  printf("Enter the character you want to print: ");
  scanf("%c", &ch);

  printf("Enter the side of a Square: ");
  scanf("%d", &rows);

  for (i = 1; i <= rows; i++)
  {
    for (j = 1; j <= rows; j++)
      printf("%c ", ch);

    printf("\n");
  }

  return 0;
}

Output:

Enter the character you want to print: $
Enter the side of a Square: 5
$ $ $ $ $
$ $ $ $ $
$ $ $ $ $
$ $ $ $ $
$ $ $ $ $

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In this tutorial, we will write a C program to print a square star pattern. Before that, you may go through the following topics in C.

• for loop in C

Square Star pattern in C

The program takes the user input for the number of rows and uses that in a for loop.

#include <stdio.h>

int main()
{
  int i, j, rows;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  for (i = 1; i <= rows; i++)
  {
    for (j = 1; j <= rows; j++)
      printf("* ");

    printf("\n");
  }

  return 0;
}

Output:

Enter the no. of rows: 5
* * * * *
* * * * *
* * * * *
* * * * *
* * * * *

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In this tutorial, we will write a C program to print half hourglass pattern of characters. Before that, you may go through the following topic in C.

• for loop in C

We will go through the two different half hourglass of alphabets with two different character patterns.

Half Hourglass Alphabet Pattern in C

Pattern 1

#include <stdio.h>

void main()
{
  int rows, i, j;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  //upper part
  for (i = rows; i >= 0; i--)
  {
    int character = 65;
    for (j = 0; j <= i; j++)
      printf("%c ", (char)(character + j));

    printf("\n");
  }

  //lower part
  for (i = 0; i <= rows; i++)
  {
    int character = 65;
    for (j = 0; j <= i; j++)
      printf("%c ", (char)(character + j));

    printf("\n");
  }

  getch();
}

Output:

Enter the no. of rows: 5
A B C D E F
A B C D E
A B C D
A B C
A B
A
A
A B
A B C
A B C D
A B C D E
A B C D E F

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Pattern 2

#include <stdio.h>

void main()
{
  int rows, i, j;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  //upper part
  for (i = rows; i >= 0; i--)
  {
    int character = 65;
    for (j = i; j >= 0; j--)
      printf("%c ", (char)(character + j));

    printf("\n");
  }

  //lower part
  for (i = 0; i <= rows; i++)
  {
    int character = 65;
    for (j = i; j >= 0; j--)
      printf("%c ", (char)(character + j));

    printf("\n");
  }

  getch();
}

Output:

Enter the no. of rows: 5
F E D C B A
E D C B A
D C B A
C B A
B A
A
A
B A
C B A
D C B A
E D C B A
F E D C B A

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In this tutorial, we will learn how to print odd number patterns in C. Before that, you may go through the following topic in C.

• for loop in C

The program takes a user input for the number of rows and prints the number pattern of the pyramid for odd numbers in C.

C Program to print Odd Number Pattern

#include <stdio.h>

void main()
{
  int i, j, k = 1, rows;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  for (i = 1; i <= rows; i++)
  {
    for (j = 1; j <= i; j++)
    {
      printf("%2d ", k);
      k = k + 2;
    }

    printf("\n");
  }

  getch();
}

Output:

In this tutorial, we will write Floyd’s triangle pattern program in C. Before that, you should have knowledge on the following topic in C.

• for loop in C

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Floyd’s Triangle in C

#include <stdio.h>

void main()
{
  int i, j, k = 1, rows;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  printf("Floyd's Triangle:\n");
  for (i = 1; i <= rows; i++)
  {
    for (j = 1; j <= i; j++, k++)
    {
      printf("%2d ", k);
    }

    printf("\n");
  }

  getch();
}

Output:

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In this tutorial, we will write a C program to print a hollow triangle star pattern. Before that, you may go through the following topics in C.

• for loop in C
• if..else statement in C

Hollow Triangle Pattern in C

Hollow equilateral triangle pattern in C.

#include <stdio.h>

int main()
{
  int i, j, k, rows;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  for (i = 1; i <= rows; i++)
  {
    for (j = i; j < rows; j++)
    {
      printf(" ");
    }

    for (k = 1; k <= (2 *i - 1); k++)
    {
      if (k == 1 || i == rows || k == (2 *i - 1))
        printf("*");
      else
        printf(" ");
    }
    printf("\n");
  }

  return 0;
}

Output:

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In this tutorial, we will write a C program to print Full sandglass star patterns. Before that, you may go through the following topic in C.

• for loop in C

The program below takes a user input for the number of rows needed and then in decreasing order of the upper half is printed and then increasing the order, the second half sandglass is printed.

This is a full hourglass pattern program in C or you can say full sandglass pattern program using a star.

Full Hourglass Pattern in C

#include <stdio.h>

int main()
{
  int i, j, k, rows;

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  printf("Output: \n\n");
  //upper half
  for (i = 1; i <= rows; i++)
  {
    for (k = 1; k < i; k++)
      printf(" ");

    for (j = i; j <= rows; j++)
      printf("* ");

    printf("\n");
  }

  //lower half
  for (i = rows - 1; i >= 1; i--)
  {
    for (k = 1; k < i; k++)
      printf(" ");

    for (j = i; j <= rows; j++)
      printf("* ");

    printf("\n");
  }

  return 0;
}

Output:

Enter the number of rows: 5
* * * * * 
 * * * *
  * * *
   * *
    *
    *
   * * 
  * * *
 * * * * 
* * * * *

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