Program for print pascal triangle in C++ language

In this tutorial, we will discuss the concept of Program for print pascal triangle in C++ language.

In this post, we will learn how to display pascal triangle using for , while and dowhile loop in C+ language

Pascal triangle

Print pascal triangle using for loop

This program allows the user to enter the number of rows and it will display pascal triangle number pattern using for loop in C++ language

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int rows,i,j,space,counter=1;
 cout<<"Enter the row for pascal triangle: ";
 cin>>rows;//takes input from the user
 for(i=0; i<rows; i++){
   for(space=1; space<=rows-i; space++)
   cout<<" ";
//first inner loop print space

   for(j=0; j<=i; j++){
   if(j==0 || i==0)
    counter=1;
   else
     counter=counter*(i-j+1)/j;
     cout<<counter<<" ";

   }
   cout<<"\n";

}
getch();
    return 0;
}

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

Print pascal triangle using the while loop

This program allows the user to enter the number of rows and it will display pascal triangle number pattern using while loop in C++ language

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int rows,i,j,space,counter=1;
 cout<<"Enter the row for pascal triangle: ";
 cin>>rows;
 i=0;
 while(i<rows){
        space=1;
   while( space<=rows-i ){
   cout<<" ";  //first inner loop print space
   space++;
   }
j=0;
   while(j<=i){
   if(j==0 || i==0)
    counter=1;
   else
     counter=counter*(i-j+1)/j;
     cout<<counter<<" ";
j++;
   }
   cout<<"\n";
 i++;
}
getch();
    return 0;
}

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

Print pascal triangle using the do-while loop

This program allows the user to enter the number of rows and it will display pascal triangle number pattern using do while loop in C++ language

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int rows,i,j,space,counter=1;
 cout<<"Enter the row for pascal triangle: ";
 cin>>rows;
 i=0;
do{
        space=1;
   do{
   cout<<" "; //first inner loop print space
   space++;
   }while( space<=rows-i );
j=0;
   do{
   if(j==0 || i==0)
    counter=1;
   else
     counter=counter*(i-j+1)/j;
     cout<<counter<<" ";
j++;
   }while(j<=i);
   cout<<"\n";
 i++;
} while(i<rows);
getch();
    return 0;
}

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

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