Program to Print Diamond Alphabet Patterns in C2 min read

In this tutorial, we will learn to write a C program to print Diamond patterns using alphabets/characters. However, in this tutorial, we will create a character pattern in C using for loop. So you may go through the following topic in C.

Pattern 1: Diamond pattern in c using alphabets

Enter the no. of rows: 8
A
ABC
ABCDE
ABCDEFG
ABCDEFGHI
ABCDEFGHIJK
ABCDEFGHIJKLM
ABCDEFGHIJKLMNO
ABCDEFGHIJKLM
ABCDEFGHIJK
ABCDEFGHI
ABCDEFG
ABCDE
ABC
A

Source Code:

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#include <stdio.h>
 
void main()
{
   int rows, i, j, k;
 
   printf("Enter the no. of rows: ");
   scanf("%d", &rows);
 
   // ASCII value
   int alphabet = 64;
 
   for (i = 1; i <= rows; i++)
   {
      for (j = 1; j <= rows - i; j++)
         printf(" ");
 
      for (k = 1; k <= i *2 - 1; k++)
         printf("%c", alphabet + k);
 
      printf("\n");
   }
 
   for (i = rows - 1; i > 0; i--)
   {
      for (j = 1; j <= rows - i; j++)
         printf(" ");
 
      for (k = 1; k <= i *2 - 1; k++)
         printf("%c", alphabet + k);
 
      printf("\n");
   }
}

Pattern 2: Diamond pattern in c using alphabets

Enter the no. of rows: 8
A
A B
A B C
A B C D
A B C D E
A B C D E F
A B C D E F G
A B C D E F G H
A B C D E F G
A B C D E F
A B C D E
A B C D
A B C
A B
A

Source Code:

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#include <stdio.h>
 
void main()
{
   int rows, i, j, k;
 
   printf("Enter the no. of rows: ");
   scanf("%d", &rows);
 
   // ASCII value
   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 ", alphabet + k);
 
      printf("\n");;
   }
 
   for (i = 0; i <= rows - 1; i++)
   {
      for (j = -1; j <= i; j++)
         printf(" ");
 
      for (k = 0; k <= rows - i - 2; k++)
         printf("%c ", alphabet + k);
 
      printf("\n");;
   }
}

Pattern 3: Diamond pattern in c using alphabets

Enter the no. of rows: 8
A
BAB
CBABC
DCBABCD
EDCBABCDE
FEDCBABCDEF
GFEDCBABCDEFG
HGFEDCBABCDEFGH
GFEDCBABCDEFG
FEDCBABCDEF
EDCBABCDE
DCBABCD
CBABC
BAB
A

Source Code:

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#include <stdio.h>
 
void main()
{
   int rows, i, j, k, l;
 
   printf("Enter the no. of rows: ");
   scanf("%d", &rows);
 
   // ASCII value
   int alphabet = 64;
 
   for (i = 1; i <= rows; i++)
   {
      for (j = 1; j <= rows - i; j++)
         printf(" ");
 
      for (k = i; k >= 1; k--)
         printf("%c", alphabet + k);
 
      for (l = 2; l <= i; l++)
         printf("%c", alphabet + l);
 
      printf("\n");
   }
 
   for (i = rows - 1; i > 0; i--)
   {
      for (j = 1; j <= rows - i; j++)
         printf(" ");
 
      for (k = i; k >= 1; k--)
         printf("%c", alphabet + k);
 
      for (l = 2; l <= i; l++)
         printf("%c", alphabet + l);
 
      printf("\n");
   }
}

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