C code to display Parallelogram star pattern using Do-while loop

In this article, we will discuss the concept of C code to display Parallelogram star pattern using Do-while loop

In this post, we are going to learn how to write a program to print parallelogram and Hollow parallelogram patterns using do-while loop in C programming language.

Print Parallelogram star patterns Using do-while loop

Code to print Parallelogram star pattern

C++ program to print Parallelogram star pattern using for loop — Parallelogram star pattern

Program 1

This program allows the user to enter the number of rows , columns and star then it will display the parallelogram star pattern using do-while loop in C programming language

#include <stdio.h>
#include <stdlib.h>
int main() {
    int i,j,rows,columns;
    char ch;
    printf("Enter the number of rows\n");
    //Ask input from the user to rows
scanf("%d",&rows);
//store the number of rows in the rows variable entered by user
 printf("Enter the number of columns\n");
 //Ask input from the user to columns
scanf("%d%c",&columns,&ch);
//store the number of columns in the columns variable entered by user
printf("Enter the character for pattern\n");
//Ask input from the user to character
ch=getchar();
printf("\n");
//move to next line
i=1;
do{//outer for loop
j=1;
   do{//inner for loop
   printf(" ");//print space
    j++;
   }while(j<=rows-i);
   j=1;
   do{//inner for loop
   printf("%c",ch);//print symbol after space
    j++;
}while(j<=columns);
 printf("\n");//move to next line
  i++;
}while(i<rows);
getch();
    return 0;
}

When the above code is executed, it produces the following result

C code to display Parallelogram star pattern using Do-while loop — Output

Code to print Hollow Parallelogram star pattern

Program 2

This program allows the user to enter the number of rows , columns and star then it will display the Hollow parallelogram star pattern using do-while loop in C programming language

#include <stdio.h>
#include <stdlib.h>
int main() {
    int i,j,rows,columns;
    //integer variable declaration
    char ch;
    //char variable declaration
    printf("Enter the number of rows\n");
    //Ask input from the user to rows
    scanf("%d",&rows);
    //store the user input in the rows variable
    printf("Enter the number of columns\n");
        //Ask input from the user to columns
scanf("%d%c",&columns,&ch); //store the user input- columns and char
printf("Enter the character for pattern\n");
ch=getchar();
printf("\n");

i=1;
do{//outer for loop
        j=0;
   do{//inner for loop
   printf(" ");//print space
 j++;
   }while(j<=rows-i);
   j=1;
   do{//inner for loop
   if(i==1 || i==rows || j==1 || j==columns){
   printf("%c",ch);//print symbol after space
   }
   else{
         printf(" ");//print space
   }
    j++;
}while(j<=columns);
 printf("\n");//move to next line
  i++;
}while(i<=rows);
getch();
    return 0;
}

When the above code is executed, it produces the following result