Half Pyramid-Numbers.cpp

#include <iostream>
using namespace std;

int main()
{
   int n;
   cin>>n;
   for(int i=1;i<=n;i++){
       for(int j=1;j<=i;j++){
               cout<<j<<" ";
        }
       cout<<endl;
   }
   return 0;
}

Input:
5

Output:
1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5