In this article, we will discuss the concept of Program to display Parallelogram star pattern using while loop in C
In this post, we are going to learn how to write a program to print parallelogram and Hollow parallelogram pattern using while loop in C programming language.
Program 1
This program allows the user to enter the number of rows , columns and any symbol then it will display the parallelogram star pattern using 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); printf("Enter the number of columns\n"); //Ask input from the user to columns scanf("%d%c",&columns,&ch); printf("Enter the character for pattern\n"); //Ask input from the user to character ch=getchar(); printf("\n"); //move to next line i=1; while(i<=rows){//outer for loop j=1; while(j<=rows-i){//inner for loop printf(" ");//print space j++; } j=1; while(j<=columns){//inner for loop printf("%c",ch);//print symbol after space j++; } printf("\n");//move to next line i++; } getch(); return 0; }
When the above code is executed, it produces the following result
Program 1
This program allows the user to enter the number of rows , columns and any symbol then it will display the Hollow parallelogram star pattern using 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; while(i<=rows){//outer for loop j=1; while(j<=rows-i){//inner for loop printf(" ");//print space j++; } j=1; while(j<=columns){//inner for loop if(i==1 || i==rows || j==1 || j==columns){ printf("%c",ch);//print symbol 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
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