C program to print half right side of pyramid star pattern

Understanding the Problem

• Goal: Write a C program that prints a half right-side pyramid pattern of stars, starting with a single star and increasing in each row to form a triangle shape.
• Key Concepts:
  • Loops: for loops for controlled iterations.
  • Indentation: Aligning stars using spaces for the desired pattern.
  • Output formatting: printf for printing stars and spaces.

Step-by-Step Guide

1. Header Inclusion

C

#include <stdio.h>

• Explanation: Includes the standard input/output library for functions like printf.

2. Main Function

C

int main() {
    // Code statements here
    return 0;
}

3. Get User Input

C

int rows;
printf("Enter the number of rows: ");
scanf("%d", &rows);

4. Outer Loop for Rows

C

for (int i = 1; i <= rows; i++) {
    // Code for printing each row
}

5. Inner Loop for Columns

C

for (int j = 1; j <= i; j++) {
    printf("*");  // Print a star
}
printf("\n");  // Move to the next line after each row

6. Indentation for Pattern

C

// Indentation for aligning stars to the right
for (int j = 1; j <= rows - i; j++) {
    printf("  ");  // Print two spaces for indentation
}

7. Complete Code

C

#include <stdio.h>

int main() {
    int rows;

    printf("Enter the number of rows: ");
    scanf("%d", &rows);

    for (int i = 1; i <= rows; i++) {
        for (int j = 1; j <= rows - i; j++) {
            printf("  ");
        }
        for (int j = 1; j <= i; j++) {
            printf("*");
        }
        printf("\n");
    }

    return 0;
}

8. Executing the Program

1. Save the code as a .c file (e.g., half_pyramid_star.c).
2. Compile using a C compiler (e.g., gcc half_pyramid_star.c -o half_pyramid_star).
3. Run the executable (e.g., ./half_pyramid_star).

Example Output

Enter the number of rows: 5 * ** ***

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