How to make diamond pattern using for loop in c++ || understand logic o...

#include<iostream>

#include<conio.h>

using namespace std;

int main()

{     // MH Computer Academy 

// Muhammad Hahsmi 

int i, j, r;

cout<<"\n\n Display the Pattern Like a Dimond:\n";

cout<<"----------------------------------------"<<endl;

cout<<"Input number of rows (Half of the Diamond)";

cin>>r;

for(i=1;i<=r;i++)// outer for loop for no of Rows

{

for(j=1;j<=r-i;j++)

{

cout<<" ";

}

for(int k=1;k<=2*i-1;k++)

{

cout<<"*";

}cout<<endl; 

}

// second half diamond 

for(i=r-1;i>=1;i--)// outer for loop for no of Rows

{

for(j=1;j<=r-i;j++)

{

cout<<" ";

}

for(int k=1;k<=2*i-1;k++)

{

cout<<"*";

}cout<<endl; 

}

return 0;

getch();

}