Print the triangle pattern outline using For Loop in C


This program is about print the pattern as triangle outline using For Loop

Source Code Example : 1

#include<stdio.h>
void main()
{
  int i,j,n;
  printf("\nEnter the value:");
  scanf("%d",&n);
  for(i=1;i<=n;i++)
  {
    printf("\n");
    for(j=1;j<=n;j++)
    {
      if(j==1||i==n||j==i)
      {
        printf(" *");
      }
      else
        printf("  ");
    }
  }
  return 0;
}
        
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Output

Enter the value:5
*
* *
*   *
*     *
* * * * *

Source Code Example : 2

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

Enter the value:5
* * * * *
 *      *
   *    *
     *  *
        *

Source Code Example : 3

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

Enter the value:5
        *
     *  *
   *    *
  *     *
* * * * *  

Source Code Example : 4

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

Enter the value:5
* * * * *
*     *
*   *
* *
*


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