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/**
* C program to print right arrow star pattern
*/
#include <stdio.h>
int main()
{
int i, j, n;
// Input number of rows from user
printf("Enter value of n : ");
scanf("%d", &n);
// Print the upper part of the arrow
for(i=1; i<n; i++)
{
// Print trailing (2*rownumber-2) spaces
for(j=1; j<=(2*i-2); j++)
{
printf(" ");
}
// Print inverted right triangle star pattern
for(j=i; j<=n; j++)
{
printf("*");
}
printf("\n");
}
// Print lower part of the arrow
for(i=1; i<=n; i++)
{
// Print trailing (2*n - 2*rownumber) spaces
for(j=1; j<=(2*n - 2*i); j++)
{
printf(" ");
}
// Print simple right triangle star pattern
for(j=1; j<=i; j++)
{
printf("*");
}
printf("\n");
}
return 0;
}Enter value of n : 5
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Basic C programming, For loop, Nested loop
Read more - Program to print left arrow star pattern.
This pattern is a combination of two patterns hence, let's first divide it into two parts.
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If you have noticed total number of spaces in upper part is 2*rownumber - 2 per row and bottom part contains total 2*n - 2*rownumber spaces per row (where n is the total number of rows). If you ignore leading spaces, then the upper part star pattern is similar to inverted right triangle star pattern and bottom part to simple right triangle star pattern which I already explained how to print.
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.