Question

Write a python function that takes in a string to use as a prompt and shows it to the user. Then get input from the user. If they entered a single sign out of the set +,-,*,/,% return it. If they entered anything else, give them a warning: “You may only enter one of the characters: +- * /%” and then repeat until they enter a correct option.

Answer 1

"""
  Python program to ask a sign from user
"""

def getInput(prompt):
  while True:
    val = input(prompt)
    signSet = ('+','-','*','/','%')
    if val in signSet:
      return val
    else:
      print('You may only enter one of the characters: +-*/%')

getInput('Enter a sign (+,-,*,/,%): ')