2D list with while true loop

Loops, append() and break

Eg:

list_of_question = []
while True:
name = input("what is your name")
age = input("what is your age " )
platfrom = input("which os do u use ")
row = [name, age, platfrom]
list_of_question.append(row)
exit = input("Exit? y/n ")
if (exit.strip().lower()[0] == "y"):
break
print(list_of_question)

Add or Remove?

ask for a name on the list (make sure it is spelled correctly)
extract each row, one at a time, from the list
check the row to see if it contains the name
if the name is in the row, use the .remove() method to remove the whole row, not just the name.

Eg:

listOfShame = []

while True:
menu = input("Add or Remove?")

if(menu.strip().lower()[0]=="a"):

name = input("What is your name? ")
age = input("What is your age? ")
pref = input("What is your computer platform? ")

row = [name, age, pref]

listOfShame.append(row)


else:
name = input("What is the name of the record to delete?")
for row in listOfShame:

if name in row:
listOfShame.remove(row)

print(listOfShame)

Comments

CONTINUE COMMAND AND EXIT LINE

The Continue Command The continue command stops executing code in the loop and starts at the top of the loop again. Essentially, we want to kick the user back to the original question. EXAMPLE : while True: print("You are in a corridor, do you go left or right?") direction = input("> ") if direction == "left": print("You have fallen to your death") break elif direction == "right": continue else: print("Ahh! You're a genius, you've won") NOTE : The else statement refers to any input besides left or right (up or esc). Since the user is a winner, we do not want to use break or it would say they have failed. EXIT COMMAND LINE The previous code continues to loop even after the user has won. Let's fix that with the exit() command EXAMPLE: print("Let's play chutes and ladders. Pick ladder or chute.") while...

FOR LOOP , RANGE

FOR LOOP A while loop is perfect to use when we don't know how many times we want the loop to repeat. If we have an idea of how many times we want the loop to repeat, we can use a for loop to loop code in exactly the same way the while loop did. EXAMPLE : for counter in range(10): print(counter) RANGE The range function creates a list of numbers in the range you create. If you only give it one number, it will start at 0 and move to a state where the final number is one less than the number in the brackets. In this case, the final number would be 9 . EXAMPLE : total = 0 for number in range(100) : total += number print(total)

WHAT IS WHILE TRUE LOOP AND TO STOP THE LOOP

while True Loop EXAMPLE (THIS WILL NOT STOP) : while True: print("This program is running") print("Aww, I was having a good time 😭") MAKE IT STOP There is a way to stop the loop with the word break . This exits the loop and stops all code at that point. Even if there is more code written after break that is inside the loop. EXAMPLE : while True: print("This program is running") goAgain = input("Go again?: ") if goAgain == "no": break print("Aww, I was having a good time 😭")

PYTHON SYNTAX

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