C++ Program to Print Left Pascals Star Triangle

Write a C++ program to print the left pascals star triangle using for loop. 

#include<iostream>
using namespace std;

int main()
{
	int i, j, k, rows;
     
    cout << "Enter Left Pascals Star Triangle Row = ";
    cin >> rows;

    cout << "Left Pascals Star Triangle Pattern\n"; 

    for(i = 1; i <= rows; i++)
    {
    	for(j = i; j < rows; j++)
		{
            cout << "  ";
        }
        for(k = 1; k <= i; k++)
        {
            cout << "* ";
        }
        cout << "\n";
    }	

    for(i = rows; i >= 1; i--)
    {
    	for(j = i; j <= rows; j++)
		{
            cout << "  ";
        }
        for(k = 1; k < i; k++)
        {
            cout << "* ";
        }
        cout << "\n";
    }
	
 	return 0;
}
C++ Program to Print Left Pascals Star Triangle

This C++ example prints the left pascals triangle pattern of a given character using a while loop.

#include<iostream>
using namespace std;

int main()
{
	int i = 1, j, k, rows;
    char ch;

    cout << "Enter Left Pascals Star Triangle Row = ";
    cin >> rows;

    cout << "Symbol to print Left Pascals Star Triangle = ";
    cin >> ch;

    cout << "Left Pascals Star Triangle Pattern\n"; 

    while(i <= rows)
    {
        j = i;
    	while( j < rows)
		{
            cout << "  ";
            j++;
        }
        k = 1;
        while( k <= i)
        {
            cout << ch << " ";
            k++;
        }
        cout << "\n";
        i++;
    }	

    i = rows;
    while( i >= 1)
    {
        j = i;
    	while( j <= rows)
		{
            cout << "  ";
            j++;
        }
        k = 1;
        while( k < i)
        {
            cout << ch << " ";
            k++;
        }
        cout << "\n";
        i--;
    }	
 	return 0;
}
Enter Left Pascals Star Triangle Row = 13
Symbol to print Left Pascals Star Triangle = &
Left Pascals Star Triangle Pattern
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About Suresh

Suresh is the founder of TutorialGateway and a freelance software developer. He specialized in Designing and Developing Windows and Web applications. The experience he gained in Programming and BI integration, and reporting tools translates into this blog. You can find him on Facebook or Twitter.