Asking the user for input until they give a valid response
To ask the user for input and repeat the prompt until they give a valid response, you can use a
while loop and use a
except block to catch any errors that may occur when trying to convert the user input to the desired data type.
Here's an example of how you could use a
while loop to ask the user for a number and repeat the prompt until they give a valid response:
while True: try: # Ask the user for a number n = int(input('Enter a number: ')) # If the input is valid, break out of the loop break except ValueError: # If the input is not valid, print an error message and continue the loop print('Invalid input. Please try again.')
This will keep asking the user for a number and trying to convert their input to an integer until they give a valid response. If the user's input is not a valid number, the
ValueError exception will be raised and the loop will continue, printing an error message and asking the user for input again. If the user's input is a valid number, the loop will break and the input will be stored in the
You can modify this code to ask the user for other types of input, such as a string or a float, by using the appropriate conversion function (e.g.,
str(input())) and handling the appropriate exception (e.g.,
ValueError for a float or
TypeError for a string).