Drawing different shapes like triangles, diamonds, pyramids etc. is the very basics of programming and are very important to learn and understand. Let’s start our program to draw Pascal Triangle  in C++ programming code.

For other triangle, diamonds & Pyramid shapes see –> Patterns and Shapes in C++

What is Pascal’s Triangle:

We will make our program to draw pascal triangle to get following output as result:

           1
         1   1
       1   2   1
     1   3   3    1
   1  4    6   4   1
 1  5   10   10  5   1

Program to draw Pascal Triangle in C++ :

#include <iostream>
using namespace std;
int main()
{
    int rows,coef=1,space,i,j;
    cout<<"Enter number of rows: ";
    cin>>rows;
    for(i=0;i<rows;i++)
    {
        for(space=1;space<=rows-i;space++)
        cout<<"  ";
        for(j=0;j<=i;j++)
        {
            if (j==0||i==0)
                coef=1;
            else
               coef=coef*(i-j+1)/j;
            cout<<"    "<<coef;
        }
        cout<<endl;
    }
}

The output will be just live above, I hope you have easily learned how this program is working, let me know in comment section if you have any question regarding the above program.