Example:
Input N: 5
Output:
Required knowledge
Basic C programming, LoopLogic to print the given half diamond number pattern with star border
Let's first remove the border of the given pattern. After removing border the pattern look like. I have already explained the logic to print the above pattern in detail in my previous post. I highly recommend you to go through the pattern before moving on to this. As this entire pattern is fully based on my previous number pattern.Now, once you got the logic of half diamond number pattern without star border. Let's move on to the pattern with star border. Here in this pattern we only need to add the logic to print borders. Printing star (*) as border is simple. We only need to add an extra printf("*"); statement before and/or after every loop as needed.
Program to print the given half diamond number pattern with star border
/**
* C program to print the half diamond number pattern with star border
*/
#include <stdio.h>
int main()
{
int i, j, N;
printf("Enter rows: ");
scanf("%d", &N);
printf("*\n");
// Print the first upper half
for(i=1; i<=N; i++)
{
printf("*");
for(j=1; j<=i; j++)
{
printf("%d", j);
}
for(j=i-1; j>=1; j--)
{
printf("%d", j);
}
printf("*");
printf("\n");
}
// Print the lower half of the pattern
for(i=N-1; i>=1; i--)
{
printf("*");
for(j=1; j<=i; j++)
{
printf("%d", j);
}
for(j=i-1; j>=1; j--)
{
printf("%d", j);
}
printf("*");
printf("\n");
}
printf("*");
return 0;
}
Output
Enter rows: 5
*
*1*
*121*
*12321*
*1234321*
*123454321*
*1234321*
*12321*
*121*
*1*
*
*
*1*
*121*
*12321*
*1234321*
*123454321*
*1234321*
*12321*
*121*
*1*
*
Screenshot to print half diamond number pattern series with star border
Happy coding ;)