Java 基礎練習(2)-Star program

import java.util.Scanner;

class MyJava {
static
{
System.out.println("Welcome to our program");
}

public static void main(String args[])
{
Scanner name = new Scanner(System.in);
System.out.println("Hello,Please enter your number");
int data1 = name.nextInt();
for (int i =0;i<data1;i++)
{
for (int j=0;j<i;j++)
{
System.out.printf("*");
}
System.out.printf("\n");
}


}

}