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C program to print hollow inverted right triangle star pattern

belongs to collection: C Programs to print Series

YasminRadwan26
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2022-06-22
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In this article, I will show you, How to write a C program to print hollow inverted right triangle star pattern. How to print hollow reverse right triangle star pattern of n rows using for loop in C programming. Here, one thing is important to know that the rows of the right triangle.

Logic to write C program to print hollow inverted right triangle star pattern:

It is very easy to print hollow inverted right triangle star patterns in C, below I have mentioned a few steps to print hollow inverted right triangle star pattern in C:

  • Enter the row value for the right triangle.
  • Here I have used two loops one is the outer loop to change the line and inner loops to print star.
  • The outer loop iterate row times and print a newline after completing the inner loop.
  • If you will look at the design carefully,  then each row contains (N-x +1) columns (where N is the row number and x is the current row number). So to print hollow inverted right triangle star patterns in C inner loop print star for first or last column or last row otherwise print space.
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YasminRadwan26
2022-06-22
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#include <stdio.h>
int main()
{
    int x = 0,y = 0;
    unsigned int rows = 0;
    printf("Enter the number of rows = ");
    scanf("%u",&rows);
    for(x=1; x<=rows; ++x)
    {
        for(y=x; y<= rows; ++y)
        {
            if((x==1) || (y==x) || (y==rows))
            {
                //Print star
                printf("*");
            }
            else
            {
                //Print space
                printf(" ");
            }
        }
        // Print new line
        printf("\n");
    }
    return 0;
}

Output:

Enter the number of rows = 10

**********

*           *

*         *

*       *

*      *

*     *

*   *

* *

**

*

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