Patterns using for loop "abcd" in square format

#include <iostream>
using namespace std;
int main() {
    
    for (int i=1;i<=4;i++){
        for(char j='a';j<='d';j++){
            cout<<j;
        }
        cout<<endl;
    }

    return 0;
}

//Second way to print same pattern

#include <iostream>
using namespace std;
int main() {
   
    for(int i=1;i<=3;i++){
        char c='a';
        for(int j=1;j<=4;j++){
            cout<<c;
            c+=1;
        }
        cout<<endl;
    }

    return 0;
}