How do you get Python to detect for no input

Question

I\'m new to coding in python and I was filling out some code that required a number of inputs. One thing it asked for was for the program to perform an action if the user pr

Answer 1

EDIT:

what about something like this:

 try:
     coinN = input("Enter next coin: ")
     if coinN.isdigit(): # checks whether coinN is a number
         if coinN == "" and totalcoin == rand:
             print("Congratulations. Your calculations were a success.")
         if coinN == "" and totalcoin < rand:
             print("I'm sorry. You only entered",totalcoin,"cents.")
     else:
         raise ValueError

 except ValueError:
     print("Invalid Input")
 else:
     totalcoin = totalcoin + int(coinN) # convert coinN to int for addition