triangle in cpp code example

Example: number triangle in c++

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=n-i;j++)
		{
			cout<<" ";
		}
		for(int j=1;j<=i;j++)
		{
			cout<<j<<" ";
		}
		cout<<endl;
	}
	return 0;			
}