C program: Hollow parallelogram star pattern program

Hollow parallelogram star pattern

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C program: Hollow parallelogram star pattern program

In this article, we will discuss the C program: Hollow parallelogram star pattern program

We can display many types of number, star, Alphabet, Binary patterns using for.while and do-while loop in C language

In this post, we are going to learn how to print Hollow Parallelogram star pattern using for, while and do-while loop in C language,

Note – Here,To create this pattern , you can use either star or any symbol as you wish

In this case, we use star pattern in the first program

Code to display Hollow Parallelogram star pattern using for loop

This program allows the user to enter the number of rows,columns and any character or symbols then the program displays the Hollow Parallelogram star pattern using for loop in C language

Program 1

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

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

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

Hollow parallelogram star pattern program

Code to display Hollow Parallelogram pattern using while loop

This program allows the user to enter the number of rows,columns and any character or symbols then the program displays the Hollow Parallelogram pattern using while loop in C language

Program 2

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

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

Hollow parallelogram star pattern program

Code to display Hollow Parallelogram pattern using do-while loop

This program allows the user to enter the number of rows,columns and any character or symbols then the program displays the Hollow Parallelogram pattern using do-while loop in C language

Program 3

#include <stdio.h>
#include <stdlib.h>
int main() {
    int i,j,rows,columns;
    char ch;
    printf("Enter the number of rows\n");
    scanf("%d",&rows); //store the user input- rows
    printf("Enter the number of columns\n");
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 do-while loop
        j=0;
   do{//inner do-while loop
   printf(" ");//print space
 j++;
   }while(j<=rows-i);
   j=1;
   do{//inner do-while loop
   if(i==1 || i==rows || j==1 || j==columns){
   printf("%c",ch);//print character 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

Hollow parallelogram star pattern program

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