C Program to Print Alphabet A Star Pattern

Write a C program to print the Alphabet A pattern of stars using for loop, while loop, and functions with an example. The below program uses the C nested for loop to iterate the rows and columns. The if else condition checks the top, outer edges, and middle lines to print stars.

#include<stdio.h>
 
int main(void)
{
    int i, j, rows;
    printf("Enter Rows to Print A =  ");
    scanf("%d", &rows);
    
    for (int i = 0 ; i < rows; i++ )
    {
        for (int j = 0 ; j <= rows/2; j++ )
        {
            if ((i == 0 && j != 0 && j != rows/2) || i == rows / 2)
                printf("*");
            else if ((j == 0 || j == rows / 2) && i != 0)
                printf("*");
            else
                printf(" ");
        }
        printf("\n");
    }
}

C Program to Print Alphabet A Star Pattern using while loop

In this C program, we replaced the for loop with the C while loop and also replaced the C Else if statement with C If else condition.

It meas the program below uses the while loop and if else to print the Alphabet A pattern of stars. For more star example, refer to the C star Pattern Programs article.

#include<stdio.h>
 
int main(void)
{
    int rows;
    printf("Enter Rows to Print A =  ");
    scanf("%d", &rows);
    
    int i = 0 ;
    while (i < rows)
    {
        int j = 0 ;
        while (j <= rows/2 )
        {
            if (((i == 0 && j != 0 && j != rows/2) || i == rows / 2)
                || ((j == 0 || j == rows / 2) && i != 0))
                printf("*");
            else
                printf(" ");
            j++;
        }
        printf("\n");
        i++;
    }
}

Output

Enter Rows to Print A =  7
 ** 
*  *
*  *
****
*  *
*  *
*  *

This example uses the do while loop and prints the Alphabet A Star Pattern. Check out the C do while loop.

#include<stdio.h>
 
int main(void)
{
    int rows;
    printf("Enter Rows to Print A =  ");
    scanf("%d", &rows);
    
    int i = 0 ;
    do
    {
        int j = 0 ;
        do
        {
            if (((i == 0 && j != 0 && j != rows/2) || i == rows / 2)
                || ((j == 0 || j == rows / 2) && i != 0))
                printf("*");
            else
                printf(" ");
            j++;
        } while (j <= rows/2 );
        printf("\n");
        i++;
    } while (i < rows);
}

Output

Enter Rows to Print A =  11
 **** 
*    *
*    *
*    *
*    *
******
*    *
*    *
*    *
*    *
*    *

In the below program, we created a function to put the for loop logic, and it accepts the rows and any character and uses the symbol to print the Alphabet A pattern of stars. Refer to the functions in C.

#include<stdio.h>
void loopLogic(int rows, char ch)
{
    for (int i = 0 ; i < rows; i++ )
    {
        for (int j = 0 ; j <= rows/2; j++ )
        {
            if (((i == 0 && j != 0 && j != rows/2) || i == rows / 2)
                || ((j == 0 || j == rows / 2) && i != 0))
                printf("%c", ch);
            else
                printf(" ");
        }
        printf("\n");
    }
}
int main(void)
{
    int rows;
    char ch;
    
    printf("Enter Character = ");
    scanf("%c", &ch);
    
    printf("Enter Rows to Print A =  ");
    scanf("%d", &rows);
    
    loopLogic(rows, ch);
}

Output

Enter Character = $
Enter Rows to Print A =  14
 $$$$$$ 
$      $
$      $
$      $
$      $
$      $
$      $
$$$$$$$$
$      $
$      $
$      $
$      $
$      $
$      $

Also Read

• C Program to Print Alphabet Z Pattern
• C Program to Print B Alphabet Pattern