I have a function that evaluates input, and I need to keep asking for their input and evaluating it until they enter a blank line. How can I set that up?
while input != '':
evaluate input
I thought of using something like that, but it didn't exactly work. Any help?
There are two ways to do this. First is like this:
while True: # Loop continuously
inp = raw_input() # Get the input
if inp == "": # If it is a blank line...
break # ...break the loop
The second is like this:
inp = raw_input() # Get the input
while inp != "": # Loop until it is a blank line
inp = raw_input() # Get the input again
Note that if you are on Python 3.x, you will need to replace raw_input with input.
python repeat until to remind myself that I should just accept that feeling :)This is a small program that will keep asking an input until required input is given.
we should keep the required number as a string, otherwise it may not work. input is taken as string by default
required_number = '18'
while True:
number = input("Enter the number\n")
if number == required_number:
print ("GOT IT")
break
else:
print ("Wrong number try again")
or you can use eval(input()) method
required_number = 18
while True:
number = eval(input("Enter the number\n"))
if number == required_number:
print ("GOT IT")
break
else:
print ("Wrong number try again")
you probably want to use a separate value that tracks if the input is valid:
good_input = None
while not good_input:
user_input = raw_input("enter the right letter : ")
if user_input in list_of_good_values:
good_input = user_input
Easier way:
required_number = 18
user_number = input("Insert a number: ")
while f"{required_number} != user_number:
print("Oops! Something is wrong")
user_number = input("Try again: ")
print("That's right!")
#continue the code
