Node.js - 구구단

function print_all() {
    for (var dan = 2; dan <= 9; dan++) {
        print_dan(dan);
    }
}

function print_dan(dan) {
    console.log(dan, "단");
    for (var index = 1; index <= 9; index++) {
        console.log(dan, "*", index, "=", dan * index);
    }
}

print_all();
print_dan(2);

간단하게 구현