Make square from length number

MakeSquare.java

import java.util.Scanner;

class MakeSquare {
    public static void main(String args[]) {
        Scanner reader = new Scanner(System.in);

        int a, b, c;

        System.out.print("Masukan angka = ");

        a = Integer.parseInt(reader.nextLine());

        for (b = 0; b < a; b++) {
            for (c = 0; c < a; c++) {
                System.out.print("*");
            }

            System.out.println("");
        }
    }
}