Assignment #107 Baby Calculator Again

Code

    /// Name: Koosha Kimelman
    /// Period: 7
    /// Program Name: Baby Calculator
    /// File Name: BabyCalculator.java
    /// Date Completed: 4/12/16
    
    import java.util.Scanner;
    
    public class BabyCalculator {
    
    	public static void main(String[] args) {
        
    		Scanner keyboard = new Scanner(System.in);
    
    		double n1, n2, t;
    		String op;
    
    		do {
    			System.out.print("> ");
    			n1  = keyboard.nextDouble();
    			if (n1 != 0) {
                    op = keyboard.next();
                    n2  = keyboard.nextDouble();
    
    			    if (op.equals("+"))
    				    t = n1 + n2;
                    else if (op.equals("-"))
                        t = n1 - n2;
                    else if (op.equals("*"))
                        t = n1 * n2;
                    else if (op.equals("/"))
                        t = n1 / n2;
                    else {
    				    System.out.println("Undefined operator: '" + op + "'.");
    				    t = 0;
                    }
    
                    System.out.println(t);
                }
    
    		} while (n1 != 0);
            
            System.out.println("Bye.");
    	}
    }
    

Picture of the output