Loops

while Loops

my_number = 1
while my_number <= 10:        # set loop condition
    print(my_number)          # do something
    my_number += 1            # increase condition variable

Keep running until the user quits

prompt = "Enter a message to share.\nEnter 'quit' to quit: "
entry = ""
while entry != 'quit':        # set loop condition
    entry = input(prompt)
    if entry != 'quit':       # check loop condition
        print(entry)
    else:
        print("You quit the program.")

Use a Flag

prompt = "Enter a message to share.\nEnter 'quit' to quit: "
state = True                             # set flag to true
entry = ""
while state:                             # loop condition based on flag
    entry = input(prompt)
    if entry == 'quit':
        state = False
        print("You quit the program.")
    else:
        print(entry)

Use while True and break

prompt = "Enter a message to share.\nEnter 'quit' to quit: "
entry = ""
while True:                      # will continue until break
    entry = input(prompt)
    if entry == 'quit':
        break
    else:
        print(entry)
print("You quit the program.")

Use continue

my_number = 0
while my_number < 10:
    my_number += 1
    if my_number % 2 ==0:
        continue                # go back to start of loop (without doing next line)
    print(my_number)