C Program to Print Diamond Pattern

Flow Control
If-else Statement in C
Programs on if-else
Switch Case in C
Switch case Programs
Conditional Operator
While loop in C
Do-while loop in C
While vs do-while
For loop in C
Break keyword in C
Continue keyword in C
Break vs Exit in C
Goto keyword in C
☕️ Flow Control Programs
Largest in 3 Numbers
Find Grade of student
Find the absolute value
Vowel or Consonant
Leap Year Program
Simple calculator in C
Check Odd or Even 
Roots of Quadratic Equation
Find Reverse of Number
Factors of a number in C
Generate Multiplication table
Find Power of a Number
Find GCD and LCM
Find factorial of Number
Count Number of Digits
Sum of digits in Number
Sum of N Natural Numbers
Sum of Squares of Natural No.
Find Sum of Odd Numbers
Find the Sum of Series
Find Fibonacci series in C
Sum of the Fibonacci series
Sum until enters +ve numbers
Sum of max 10 no. & Skip -ve
☕️ C Conversion Programs
Celsius to Fahrenheit
Fahrenheit to Celsius
Decimal ↔ Binary
Decimal ↔ Octal
Octal ↔ Binary in C
☕️ Number Programs in C
Prime Number in C
Strong Number in C
Krishnamurthy Number
Neon Number in C
Palindrome number
Perfect Number in C
Armstrong Number
☕️ Pattern Programs in C
Pattern programs in C
Printing pattern using loops
Floyd’s triangle Program
Pascal Triangle Program
Pyramid Star Pattern in C
Diamond Pattern Programs
Half Diamond pattern in C
Print Diamond Pattern
Hollow Diamond Pattern
Diamond Pattern of Numbers

There are many pattern programs are written by programmers for practice purposes. The diamond pattern programs are one of them. Here we will write C program to print a diamond pattern.

C Program to Print Diamond Star Pattern

For a given number n the diamond shape will be of 2*n rows.

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

C program for the above pattern,

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

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

   for(int i=1; i<=n; i++)
   {
     for(int j=i; j<=n; j++)
     {
       printf(" ");
     }
     for(int k=1; k<=2*i-1; k++)
     {
       printf("*");
     }
     printf("\n");
   }

   for(int i=n-1; i>=1; i--)
   {
     for(int j=n; j>=i; j--)
     {
       printf(" ");
     }
     for(int k=1; k<=2*i-1; k++)
     {
       printf("*");
     }
     printf("\n");
   }

   return 0;
 }

Output:-

Enter number of rows: 3
   *
  ***
 *****
  ***
   *
Enter number of rows: 5
     *
    ***
   *****
  *******
 *********
  *******
   *****
    ***
     *

Print the diamond pattern using recursion

We can display the same pattern using recursion also. The pattern is divided into two portions. The increasing portion and the decreasing portion of the pattern. The below program displays the diamond pattern of stars using recursion.

 #include<stdio.h> 
 void printDiamond (int r)
 {
    int c, space;
    static int stars = -1;

    if (r <= 0) return;

    // increasing portion of the pattern
    space = r - 1;
    stars += 2;
    for (c = 0; c < space; c++)
    printf(" ");
    for (c = 0; c < stars; c++)
    printf("*");
    printf("\n"); //next line

    printDiamond(--r);

    // decreasing portion of the pattern
    space = r + 1;
    stars -= 2;
    for (c = 0; c < space; c++)
    printf(" ");
    for (c = 0; c < stars; c++)
    printf("*");
    printf("\n"); //next line
 }

 int main ()
 {
   int n;

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

   printDiamond(n);

   return 0;
 }

Program display first row of the pattern and then due to recursive function second row is displayed, and so. After displaying all increasing portions of the pattern, the value of r becomes 0. In the next recursive call the recursive function return because of r<=0. Now, the remaining codes in each call will be executed.

Note that for n=5 the recursive function called only 5 times not 10 times.


C program to print diamond star pattern at the center of the screen

Generally, on a computer screen, we can print Maximum 80 characters horizontally. The center is half of the row. So in every row, there should be 40-i spaces, here i is the row. Remaining all other codes will be space as the previous one.

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

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

   for(int i=1; i<=n; i++)
   {
     for(int j=1; j<=40-i; j++)
     {
       printf(" ");
     }
     for(int k=1; k<=2*i-1; k++)
     {
       printf("*");
     }
     printf("\n");
   }

   for(int i=n-1; i>=1; i--)
   {
     for(int j=40; j>i; j--)
     {
       printf(" ");
     }
     for(int k=1; k<=2*i-1; k++)
     {
       printf("*");
     }
     printf("\n");
   }

   return 0;
 }
Output:-

Enter number of rows: 5
                                       *
                                      ***
                                     *****
                                    *******
                                   *********
                                    *******
                                     *****
                                      ***
                                       *
c program to print diamond pattern

C Program to Print Inverse Diamond Pattern

Program to print Inverse Diamond pattern, for input n=5 the output is:-

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

C Program for the above pattern,

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

   printf("Enter value of n: ");
   scanf("%d",&n);

   for(int i=1; i<=n; i++)
   {
     for(int j=i; j<=n; j++)
     {
       printf("*");
     }
     for(int k=1; k<2*i-1; k++)
     {
       printf(" ");
     }
     for(int j=i; j<=n; j++)
     {
       printf("*");
     }
     printf("\n");
   }

   for(int i=n-1; i>=1; i--)
   {
     for(int j=n; j>=i; j--)
     {
       printf("*");
     }
     for(int k=1; k<2*i-1; k++)
     {
       printf(" ");
     }
     for(int j=n; j>=i; j--)
     {
       printf("*");
     }
     printf("\n");
   }

   return 0;
 }

Output:-

Enter value of n: 5
**********
****  ****
***    ***
**      **
*        *
**      **
***    ***
****  ****
**********
Enter value of n: 7
**************
******  ******
*****    *****
****      ****
***        ***
**          **
*            *
**          **
***        ***
****      ****
*****    *****
******  ******
**************

Diamond Pattern of Numbers

For input n=5 the output is,

     1
    123
   12345
  1234567
 123456789
  1234567
   12345
    123
     1

C Program for the above pattern,

 #include<stdio.h> 
 int main()
 {
   int n, a;

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

   for(int i=1; i<=n; i++)
   {
     a=1;
     for(int j=i; j<=n; j++)
     {
       printf(" ");
     }
     for(int k=1; k<=2*i-1; k++)
     {
       printf("%d",a++);
     }
     printf("\n");
   }

   for(int i=n-1; i>=1; i--)
   {
     a=1;
     for(int j=n; j>=i; j--)
     {
       printf(" ");
     }
     for(int k=1; k<=2*i-1; k++)
     {
       printf("%d",a++);
     }
     printf("\n");
   }

   return 0;
 }

Output for the different input values:-

Enter number of rows: 3
   1
  123
 12345
  123
   1
Enter number of rows: 5
     1
    123
   12345
  1234567
 123456789
  1234567
   12345
    123
     1

Display the given diamond pattern of numbers. For n value of 4, the output is:-

    0
   010
  01210
 0123210
012343210
 0123210
  01210
   010
    0

In this pattern, each row starts with zero and also ends with zero. It is a diamond pattern so every row contains odd items. This pattern is the same as the previous one but it has different numbers.

 #include<stdio.h> 
 int main()
 {
   int n, a=0;

   printf("Enter value of n: ");
   scanf("%d",&n);

   // increasing portion of the pattern
   for(int i=1; i<=n+1; i++)
   {
     for(int j=i; j<=n; j++)
     {
       printf(" "); //space
     }
     for(int k=1; k<=2*i-1; k++)
     {
        if(k<i) printf("%d",a++);
        else if(k==i) printf("%d",a);
        else printf("%d",--a);
      }
      printf("\n");
   }

   // decreasing portion of the pattern
   for(int i=n; i>=1; i--)
   {
     for(int j=n; j>=i; j--)
     {       printf(" ");
     }
     for(int k=1; k<=2*i-1; k++)
     {
       if(k<i) printf("%d",a++);
       else if(k==i) printf("%d",a);
       else printf("%d",--a);
     }
     printf("\n");
   }

   return 0;
 }

Output for the different input values:-

Enter value of n: 3
   0
  010
 01210
0123210
 01210
  010
   0
Enter value of n: 5
     0
    010
   01210
  0123210
 012343210
01234543210
 012343210
  0123210
   01210
    010
     0

There are many other diamond pattern like Half Diamond pattern in C, Hollow Diamond Pattern in C, and Diamond Pattern of Numbers.

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Flow Control
If-else Statement in C
Programs on if-else
Switch Case in C
Switch case Programs
Conditional Operator
While loop in C
Do-while loop in C
While vs do-while
For loop in C
Break keyword in C
Continue keyword in C
Break vs Exit in C
Goto keyword in C
☕️ Flow Control Programs
Largest among 3 Numbers
Find Grade of student
Find the absolute value
Check Vowel or Consonant
Leap Year Program
Simple calculator in C
Check Odd or Even 
Roots of Quadratic Equation
Find Reverse of Number
Factors of a number in C
Generate Multiplication table
Find Power of a Number
Find GCD and LCM
Find factorial of Number
Count Number of Digits
Sum of digits in Number
Sum of N Natural Numbers
Sum of Squares of Natural No.
Find Sum of Odd Numbers
Find the Sum of Series
Find Fibonacci series in C
Sum of the Fibonacci series
Sum until enters +ve numbers
Sum of max 10 no. & Skip -ve
☕️ C Conversion Programs
Celsius to Fahrenheit
Fahrenheit to Celsius
Decimal ↔ Binary
Decimal ↔ Octal
Octal ↔ Binary in C
☕️ Number Programs in C
Prime Number in C
Strong Number in C
Krishnamurthy Number
Neon Number in C
Palindrome number
Perfect Number in C
Armstrong Number
☕️ Pattern Programs in C
Pattern programs in C
Printing pattern using loops
Floyd’s triangle Program
Pascal Triangle Program
Pyramid Star Pattern in C
Diamond Pattern Programs
Half Diamond pattern in C
Print Diamond Pattern
Hollow Diamond Pattern
Diamond Pattern of Numbers

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