# Set an initial condition.
game_active = True

# Set up the while loop.
while game_active:
    # Run the game.
    # At some point, the game ends and game_active will be set to False.
    #   When that happens, the loop will stop executing.
    
# Do anything else you want done after the loop runs.

# The player's power starts out at 5.
power = 5

# The player is allowed to keep playing as long as their power is over 0.
while power > 0:
    print("You are still playing, because your power is %d." % power)
    # Your game code would go here, which includes challenges that make it
    #   possible to lose power.
    # We can represent that by just taking away from the power.
    power = power - 1
    
print("\nOh no, your power dropped to 0! Game Over.")

# Get some input from the user.
variable = input('Please enter a value: ')
# Do something with the value that was entered.

# Start with a list containing several names.
names = ['guido', 'tim', 'jesse']

# Ask the user for a name.
new_name = input("Please tell me someone I should know: ")

# Add the new name to our list.
names.append(new_name)

# Show that the name has been added to the list.
print(names)

# The same program, in Python 2.7

# Start with a list containing several names.
names = ['guido', 'tim', 'jesse']

# Ask the user for a name.
new_name = raw_input("Please tell me someone I should know: ")

# Add the new name to our list.
names.append(new_name)

# Show that the name has been added to the list.
print(names)

# Start with an empty list. You can 'seed' the list with
#  some predefined values if you like.
names = []

# Set new_name to something other than 'quit'.
new_name = ''

# Start a loop that will run until the user enters 'quit'.
while new_name != 'quit':
    # Ask the user for a name.
    new_name = input("Please tell me someone I should know, or enter 'quit': ")

    # Add the new name to our list.
    names.append(new_name)

# Show that the name has been added to the list.
print(names)

# Start with an empty list. You can 'seed' the list with
#  some predefined values if you like.
names = []

# Set new_name to something other than 'quit'.
new_name = ''

# Start a loop that will run until the user enters 'quit'.
while new_name != 'quit':
    # Ask the user for a name.
    new_name = input("Please tell me someone I should know, or enter 'quit': ")

    # Add the new name to our list.
    if new_name != 'quit':
        names.append(new_name)

# Show that the name has been added to the list.
print(names)

# Give the user some context.
print("\nWelcome to the nature center. What would you like to do?")

# Set an initial value for choice other than the value for 'quit'.
choice = ''

# Start a loop that runs until the user enters the value for 'quit'.
while choice != 'q':
    # Give all the choices in a series of print statements.
    print("\n[1] Enter 1 to take a bicycle ride.")
    print("[2] Enter 2 to go for a run.")
    print("[3] Enter 3 to climb a mountain.")
    print("[q] Enter q to quit.")
    
    # Ask for the user's choice.
    choice = input("\nWhat would you like to do? ")
    
    # Respond to the user's choice.
    if choice == '1':
        print("\nHere's a bicycle. Have fun!\n")
    elif choice == '2':
        print("\nHere are some running shoes. Run fast!\n")
    elif choice == '3':
        print("\nHere's a map. Can you leave a trip plan for us?\n")
    elif choice == 'q':
        print("\nThanks for playing. See you later.\n")
    else:
        print("\nI don't understand that choice, please try again.\n")
        
# Print a message that we are all finished.
print("Thanks again, bye now.")

# Define the actions for each choice we want to offer.
def ride_bicycle():
    print("\nHere's a bicycle. Have fun!\n")
    
def go_running():
    print("\nHere are some running shoes. Run fast!\n")
    
def climb_mountain():
    print("\nHere's a map. Can you leave a trip plan for us?\n")

# Give the user some context.
print("\nWelcome to the nature center. What would you like to do?")

# Set an initial value for choice other than the value for 'quit'.
choice = ''

# Start a loop that runs until the user enters the value for 'quit'.
while choice != 'q':
    # Give all the choices in a series of print statements.
    print("\n[1] Enter 1 to take a bicycle ride.")
    print("[2] Enter 2 to go for a run.")
    print("[3] Enter 3 to climb a mountain.")
    print("[q] Enter q to quit.")
    
    # Ask for the user's choice.
    choice = input("\nWhat would you like to do? ")
    
    # Respond to the user's choice.
    if choice == '1':
        ride_bicycle()
    elif choice == '2':
        go_running()
    elif choice == '3':
        climb_mountain()
    elif choice == 'q':
        print("\nThanks for playing. See you later.\n")
    else:
        print("\nI don't understand that choice, please try again.\n")
        
# Print a message that we are all finished.
print("Thanks again, bye now.")

# Start with a list of unconfirmed users, and an empty list of confirmed users.
unconfirmed_users = ['ada', 'billy', 'clarence', 'daria']
confirmed_users = []

# Work through the list, and confirm each user.
while len(unconfirmed_users) > 0:
    
    # Get the latest unconfirmed user, and process them.
    current_user = unconfirmed_users.pop()
    print("Confirming user %s...confirmed!" % current_user.title())
    
    # Move the current user to the list of confirmed users.
    confirmed_users.append(current_user)
    
# Prove that we have finished confirming all users.
print("\nUnconfirmed users:")
for user in unconfirmed_users:
    print('- ' + user.title())
    
print("\nConfirmed users:")
for user in confirmed_users:
    print('- ' + user.title())

# Start with a list of unconfirmed users, and an empty list of confirmed users.
unconfirmed_users = ['ada', 'billy', 'clarence', 'daria']
confirmed_users = []

# Work through the list, and confirm each user.
while len(unconfirmed_users) > 0:
    
    # Get the latest unconfirmed user, and process them.
    current_user = unconfirmed_users.pop(0)
    print("Confirming user %s...confirmed!" % current_user.title())
    
    # Move the current user to the list of confirmed users.
    confirmed_users.append(current_user)
    
# Prove that we have finished confirming all users.
print("\nUnconfirmed users:")
for user in unconfirmed_users:
    print('- ' + user.title())
    
print("\nConfirmed users:")
for user in confirmed_users:
    print('- ' + user.title())

current_number = 1

# Count up to 5, printing the number each time.
while current_number <= 5:
    print(current_number)

1
1
1
1
1
...

current_number = 1

# Count up to 5, printing the number each time.
while current_number <= 5:
    print(current_number)
    current_number = current_number + 1

current_number = 1

# Count up to 5, printing the number each time.
while current_number <= 5:
    print(current_number)
    current_number = current_number - 1

1
0
-1
-2
-3
...