Pascal Triangle program in C++ language

In this tutorial, we will discuss the concept of Pascal Triangle program in C++ language

In this topic, we are going to learn how to write a program to print Pascal triangle pattern using number in C++ programming language

Here, we use for, while and do-while loops for printing pascal triangle

Pascal Triangle program

Display pascal pattern in C++ using loops

understanding Pascal Triangle

C++ Code display triangle using for loop

In this program, the user is asked to enter number of rows and then it will display triangle number pattern using for loop in C++ language

Program 1

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

int main()
{
    int rows,i,j,space,counter=1;
 cout<<"Enter the No of rows: ";
 cin>>rows;
//input rows for print pascal triangle
 for( i=0; i<rows;  i++){//outer for loop to print no of rows

   for(space=1; space<=rows-i; space++ ){
   cout<<" ";//inner for loop to print space

   }

   for(j=0; j<=i; j++){//inner for loop to print number
   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

Triangle program

C++ Code display triangle using while loop

In this program, the user is asked to enter the number of rows and then it will display a triangle number pattern using the while loop in the C++ language

Program 2

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

int main()
{
    int rows,i,j,space,counter=1;
 cout<<"Enter the No of rows: ";
 cin>>rows;
//input number of rows for print pascal triangle
 i=0;
 while(i<rows){
        space=1;
   while( space<=rows-i ){
   cout<<" ";
   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

Triangle program

C++ Code displays triangle using a do-while loop

In this program, the user is asked to enter a number of rows and then it will display a triangle number pattern using the do-while loop in C++ language

Program 3

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

int main()
{
    int rows,i,j,space,counter=1;
 cout<<"Enter the No of rows: ";
 cin>>rows;//input number of rows for print pascal triangle
 i=0;
 do{//outer do while loop
        space=1;
   do{//inner do-while loop
   cout<<" ";
   space++;
   }while( space<=rows-i );
j=0;
  do{//inner do-while loop
   if(j==0 || i==0)
    counter=1;
   else
     counter=counter*(i-j+1)/j;
     cout<<counter<<" ";//print pascal triangle
j++;
   } while(j<=i);
   cout<<"\n";
 i++;
}while(i<rows);
getch();
    return 0;
}

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

Triangle program

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