Art4.java

public class Art4{

  public static void main(String args[]){
  
    
/*
  0
  00
  000
  0000   
 */

int y = 0;

    while(y<10){ // main

          int x =0;
        // start
        while(x <= y){            
            
          System.out.print("*");            
          
        x++;
        } //end     
        
       
     y++;
        System.out.println();
    } // end main
    
  
      
 }

}