SEE IT                                                                      
                                                                                  
      Read      the   code     like   a  story                                    
                                                                                  
                                                                                  
                                                                                  
      Predict first. Then run it in the online editor.                            
                                                                                  
                                                                                  
                                                                                  
                                                                                  
        step = 1                                                                  
        print("Step", step, ": open the map")                                     
        step = step + 1                                                           
        print("Step", step, ": choose a path")                                    
                                                                                  
                                                                                  
                                                                                  
        ONE POSSIBLE OUTPUT                                                       
                                                                                  
        Step 1 : open the map                                                     
        Step 2 : choose a path                                                    
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
        CODE DETECTIVE                                                            
                                                                                  
        Point to the part that can change. Point to the part that produces output. What do you think each
        punctuation mark is doing?                                                
                                                                                  
                                                                                  
                                                                                  
                                                                                  
      Algorithms and Bugs                                                 21
