Star Patterns Program in C

In this topic, we will learn how to create the patterns by using C language. We will create the patterns by using either a '*' star character or some other character. We will create different patterns or a geometrical shape such as triangle, square, etc.

We are going to cover the following patterns. You can view the code of any pattern given below by clicking on the pattern.

Square Star Pattern

The code to create the square star pattern is given below:

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

Output

Hollow Square Star Pattern

Now, we create the hollow square star pattern. The source code for this pattern is given below:

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

Output

Hollow Square Pattern with Diagonal

The code for the hollow square star pattern is given below:

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

Output

Rhombus Star Pattern

The code for the rhombus star pattern is given below:

#include <stdio.h>

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

Output

Hollow Rhombus Star Pattern

The code for the hollow rhombus star pattern is given below:

#include <stdio.h>

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

Output

Mirrored Rhombus Star Pattern

The code for the mirrored rhombus star pattern is given below:

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

Output

Hollow Mirrored Rhombus Star Pattern

The code for the hollow mirrored rhombus star pattern is given below:

#include <stdio.h>
int main()
{
    int n;
    printf("Enter the number of rows");
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<i;j++)
        {
            printf(" ");
        }
        for(int k=1;k<=n;k++)
        {
         if(i==1 || i==n || k==1 || k==n)
           printf("*");
            else
            printf(" ");
        }
        printf("\n");
    }
    return 0;
}

Output

Right Triangle Star Pattern

The code for the right triangle star pattern is given below:

#include <stdio.h>

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

Output

Hollow Right Triangle Star Pattern

The code for the hollow right triangle star pattern is given below:

#include <stdio.h>

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

Output

Mirrored Right Triangle Star Pattern

The code for the mirrored right triangle star pattern is given below:

#include <stdio.h>

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

Output

Hollow Mirrored Right Triangle Star Pattern

The code for the hollow mirrored right triangle star pattern is given below:

#include <stdio.h>

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

Output

Inverted Right Triangle Star Pattern

The code for the inverted right triangle star pattern is given below:

#include <stdio.h>

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

Output

Hollow Inverted Right Triangle Star Pattern

The code for the hollow inverted right triangle star pattern is given below:

#include <stdio.h>

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

Output

Inverted Mirrored Right Triangle Star Pattern

The code for the inverted mirrored right triangle star pattern is given below:

#include <stdio.h>

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

Output

Hollow Inverted Mirrored Right Triangle Star Pattern

The code for the hollow inverted mirrored right triangle star pattern is given below:

#include <stdio.h>

int main()
{
    int n,m;
    printf("Enter the number of rows");
    scanf("%d",&n);
    m=n;
   for(int i=1;i<=n;i++)
   {
       for(int j=1;j<i;j++)
       {
           printf(" ");
       }
       for(int k=1;k<=m;k++)
       {
          if(i==1 || k==1 || k==m)
           printf("*");
           else
           printf(" ");
       }
       m--;
   
      printf("\n");
    }
    return 0;
}

Output

Pyramid Star Pattern

The code for the pyramid star pattern is given below:

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

Output

Hollow Pyramid Star Pattern

The code for the hollow pyramid star pattern is given below:

#include <stdio.h>

int main()
{
    int n,m;
    printf("Enter the number of rows");
    scanf("%d",&n);
    m=n;
   for(int i=1;i<=n;i++)
   {
       for(int j=1;j<=m-1;j++)
       {
           printf(" ");
       }
       for(int k=1;k<=2*i-1;k++)
       {
          if(k==1 || k==2*i-1 || i==n)
         printf("*");
         else
         printf(" ");
       }
       m--;
   
      printf("\n");
    }
    return 0;
}

Output

Inverted Pyramid Star Pattern

The code for the inverted pyramid is given below:

#include <stdio.h>

int main()
{
    int n,m=1;
    printf("Enter the number of rows");
    scanf("%d",&n);

   for(int i=n;i>=1;i--)
   {
       for(int j=1;j<m;j++)
       {
           printf(" ");
       }
       for(int k=1;k<=2*i-1;k++)
       {
           printf("*");
       }
       m++;
   
      printf("\n");
    }
    return 0;
}

Output

Hollow Pyramid Star Pattern

The code for the hollow pyramid star pattern is given below:

#include <stdio.h>

int main()
{
    int n,m=1;
    printf("Enter the number of rows");
    scanf("%d",&n);

   for(int i=n;i>=1;i--)
   {
       for(int j=1;j<m;j++)
       {
           printf(" ");
       }
       for(int k=1;k<=2*i-1;k++)
       {
          if(k==1 || k==2*i-1 || i==n)
           printf("*");
           else
           printf(" ");
       }
       m++;
   
      printf("\n");
    }
    return 0;
}

Output

Half Diamond Star Pattern

The code for the half diamond star pattern is given below:

#include <stdio.h>

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

Output

Diamond Star Pattern

The code for the diamond star pattern is given below:

#include <stdio.h>
int main(void) {
  int n;
  printf("Enter the number of rows\n");
  scanf("%d",&n);
  int spaces=n-1;
  int stars=1;
  for(int i=1;i<=n;i++)
  {
    for(int j=1;j<=spaces;j++)
    {
      printf(" ");
    }
    for(int k=1;k<=stars;k++)
    {
      printf("*");
    }
    if(spaces>i)
    {
      spaces=spaces-1;
      stars=stars+2;
    }
    if(spaces<i)
    {
      spaces=spaces+1;
      stars=stars-2;
    }
    printf("\n");
  }
  return 0;}

Output

Right Arrow Star Pattern

The code of the right arrow star pattern is given below:

#include <stdio.h>

int main(void) {
  
  int n;
  printf("Enter the number of columns");
  scanf("%d",&n);
  //printing the upper part of the pattern..
 for(int i=0;i<n;i++)
 {
   for(int j=0;j<i;j++)
   {
       printf(" ");
   }
   for(int k=1;k<=n-i;k++)
   {
     printf("*");
   }
   printf("\n");
 }
for(int i=1;i<n;i++)
{
  for(int j=1;j<n-i;j++)
  {
    printf(" ");
  }
  for(int k=1;k<=i+1;k++)
  {
    printf("*");
  }
  printf("\n");
}
  return 0;
}

Output

Left Arrow Star Pattern

The code for the Left arrow star pattern is given below:

#include <stdio.h>

int main(void) {
  
  int n;
  printf("Enter the number of columns");
  scanf("%d",&n);
  //printing the upper part of the pattern..
 for(int i=1;i<=n;i++)
 {
   for(int j=1;j<=n-i;j++)
   {
       printf(" ");
   }
   for(int k=0;k<=n-i;k++)
   {
     printf("*");
   }
   printf("\n");
 }
for(int i=1;i<n;i++)
{
  for(int j=1;j<i+1;j++)
  {
    printf(" ");
  }
  for(int k=1;k<=i+1;k++)
  {
    printf("*");
  }
  printf("\n");
}
  return 0;
}

Output

Plus Star Pattern

The code for the plus star pattern is given below:

#include <stdio.h>

int main(void) {
  int n;
  printf("Enter the odd number only");
  scanf("%d", &n);
  for(int i=1;i<=n;i++)
  {
    if(i==((n/2)+1))
    {
      for(int j=1;j<=n;j++)
      {
        printf("+");
      }
 
    }
    else
    {
    for(int j=1;j<=n/2;j++)
    {
      printf(" ");
    }
    printf("+");
    }
    printf("\n");
  }
  return 0;
}

Output

X Star Pattern

The code for the X star pattern is given below:

#include <stdio.h>

int main(void) {
  int n,m;
  printf("Enter the number");
  scanf("%d",&n);
  m=2*n-1;
  for(int i=1;i<=m;i++)
  {
    for(int j=1;j<=m;j++)
    {
       if(i==j || j==(m-i+1))
       {
         printf("*");
       }
       else
       {
         printf(" ");
       }
    }
    printf("\n");
  }
  return 0;
}

Output