C++ Program to create Hollow right triangle star pattern

Hollow right triangle

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C++ Program to create Hollow right triangle star pattern

In this article, we will discuss the C++ Program to create the hollow right triangle star pattern

We can display many types of number, star, Alphabet patterns using for.while and do-while loops in c++

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

Code to create Hollow right triangle using for loop

This program allows the user to enter the number of rows with symbol and then the program displays the right triangle star pattern using for loop in C++ language

Program 1

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    int i,j,rows;
    char ch;
    cout<<"Enter the number of rows\n";
    cin>>rows;
     cout<<"Enter the Symbol for pattern\n";
    cin>>ch;
    cout<<"\n";
for(i=1; i<=rows;  i++){//outer for loop
  for(j=1; j<=i; j++){//inner for loop
   //print i number of star
     if(j==1 || j==i || i==rows){
       cout<<ch;
     }
     else{
       cout<<" ";
}

}
cout<<"\n";//move to next line


}
getch();
    return 0;
}

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

Code to create Hollow right triangle using while loop

This program allows the user to enter the number of rows with symbol and then the program displays the right triangle star pattern using while loop in C++ language

Program 2

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    int i,j,rows;
    char ch;
    cout<<"Enter the number of rows\n";
    cin>>rows;
     cout<<"Enter the Symbol for pattern\n";
    cin>>ch;
    cout<<"\n";
    i=1;
while(i<=rows){//outer for loop
        j=1;
  while(j<=i){//inner for loop
   //print i number of star
     if(j==1 || j==i || i==rows){
       cout<<ch;
     }
     else{
       cout<<" ";
}
j++;
}
cout<<"\n";//move to next line
 i++;
}
getch();
    return 0;
}

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

Code to create Hollow right triangle using the do-while loop

This program allows the user to enter the number of rows with the symbol and then the program displays the right triangle star pattern using do-while loop in C++ language

Program 3

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    int i,j,rows;
    char ch;
    cout<<"Enter the number of rows\n";
    cin>>rows;
     cout<<"Enter the Symbol for pattern\n";
    cin>>ch;
    cout<<"\n";
    i=1;
do{//outer do-while loop
        j=1;
  do{//inner do-while loop
   //print i number of star
     if(j==1 || j==i || i==rows){
       cout<<ch;
     }
     else{
       cout<<" ";
}
j++;
}while(j<=i);
cout<<"\n";//move to next line
 i++;
}while(i<=rows);
getch();
    return 0;
}

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

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