C program to print hollow right triangle star pattern * ** * * * * ***

🚀 Programming Example

C program to print hollow right triangle star pattern

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👁 5,363 Views

💻 Practical Program

📘 Step Learning

Write a C program to print hollow right triangle star pattern series using for loop. How to print hollow right triangle star pattern series of n rows using for loop in C programming. Logic to print hollow right triangle star pattern series in C programming.

💻 Program Code

/**
 * C program to print hollow right triangle star pattern
* atnyla.com
 */

#include <stdio.h>

int main()
{
    int i, j, rows;

    /* Input rows from user */
    printf("Enter number of rows: ");
    scanf("%d", &rows);

    for(i=1; i<=rows; i++)
    {
        for(j=1; j<=i; j++)
        { 
            /* 
             * Print star for first column(j==1), 
             * last column(j==i) or last row(i==rows).
             */
            if(j==1 || j==i || i==rows)
            {
                printf("*");
            }
            else
            {
                printf(" ");
            }
        }

        printf("\n");
    }

    return 0;
}

🖥 Program Output

<pre style="text-align:left">Enter number of rows: 5
*
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* *
*  *
*****
</pre>

📘 Explanation

Required knowledge

Basic C programming,?If else,?For loop,?Nested loop

Must know -?Program to print hollow square star pattern.

Logic to print hollow right triangle star pattern

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Logic to print a hollow right triangle is almost similar to?right triangle star pattern?logic. Just with this pattern you need to print stars only for first and last column or row.

Step by step descriptive logic to print hollow right triangle star pattern.

Input number of rows to print from user. Store it in a variable say?rows.
To iterate through rows, run an outer loop from 1 to?rows. The loop structure should look like?for(i=1; i<=rows; i++).
To iterate through columns, run an inner loop from 1 to?i. The loop structure should look like?for(j=1; j<=i; j++).
Inside inner loop print star for first or last column or last row otherwise print space.
After printing all columns of a row, move to next line i.e. print new line.

Another Way for the above program


 /*
 * C program to print right triangle star pattern series
* atnyla.com
 */

#include <stdio.h>

int main()
{
    int i, j, n;

    /* Input number of rows from user */
    printf("Enter value of n: ");
    scanf("%d", &n);

    for(i=1; i<=n; i++)
    {
        /* Print i number of stars */
        for(j=1; j<=n; j++)
        {
            
			if(j<=i)
			printf("*");
			else
			printf(" ");
        }

        /* Move to next line */
        printf("\n");
    }

    return 0;
}

🎯 How to learn from this example

First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.

🔥 Practice suggestion

Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.

C program to print hollow right triangle star pattern
* ** * * * * *****

💻 Program Code

🖥 Program Output

📘 Explanation

Required knowledge

Logic to print hollow right triangle star pattern

Another Way for the above program

Master Programming Through Practical Examples

🎯 How to learn from this example

🔥 Practice suggestion

⚡ Quick Practice Flow

📚 Related Programs

C program to print hollow right triangle star pattern * ** * * * * *****

💻 Program Code

🖥 Program Output

📘 Explanation

Required knowledge

Logic to print hollow right triangle star pattern

Another Way for the above program

Master Programming Through Practical Examples

🎯 How to learn from this example

🔥 Practice suggestion

⚡ Quick Practice Flow

📚 Related Programs

C program to print hollow right triangle star pattern
* ** * * * * *****