#PythonTuesday #Coding --- Break the Loop...

Just my simple example to illustrate the difference between for loop and while loop in Python. 

# for loop

ingredients = ["Cheese", "Herbs", "Tomato", "Garlic", "Eggs"]
for x in ingredients:
     print x

# while loop with the same ingredients…

mylist = [ ]
mylist.append("Cheese")
mylist.append("Herbs")
mylist.append("Tomato")
mylist.append("Garlic")
mylist.append("Eggs")

while True:
      print(mylist)
      if mylist[3] == "Garlic":  #check if item 3 (mylist[3]) is Garlic or not.
            break  

#We are able to exit from this while loop because this condition is true. We have defined the item 3 as "Garlic"--- append starts from 0. We can break this while loop and system will only print mylist once...

#If we change this if statement, the result will be different:


while True:
    print(mylist)
    if mylist[3] == "Cheese": #This time we check if the item 3 is Cheese or not.
          break 

#Only under the condition that item 3 is Cheese, then we are able to break this while loop. Now the boolean condition didn't yield true 'cause obviously item 3 is Garlic. So the system   will print mylist forever...

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Back to the CodeCombat game --- At the level of “The Second Kithmaze”, our goals include:

• Your hero must survive.
• Navigate the maze.
• Under 6 statements.

With ‘’while loop”, we can easily navigate the maze as following:

while True:
      self.moveRight()
      self.moveUp()
      self.moveRight()
      self.moveDown()

Screenshot of "The Second Kithmaze":

At the level of “Dread Door”, a while loop is used to attack the door:

• Destroy the door.
• Under 3 statements.

Code:

while True:
      self.attack(“Door”)

Under this while loop, our hero will keep kicking the door. We can imagine if her health point is less than 5 for example, then we can break this while loop and let her fall asleep right away…  

Screenshot of "Dread Door":