message: credit card problem logic updated
diff: # Simple Python Program which mainly satisfies the required conditions on the Problem Statement using IF statements
  # Shows the implementation of array to string and string methods
  +# Refer to the below information for checking validity of a Credit Card
  +# 1. A credit card contains 16 digits, starting with 4,5 or 6, all continuous or separated 4 at a time by
  +# '-' as a separator, and no other separator
  +# 2. A credit card number contains only numbers and not any other character
  +# 3. No credit card has 4 digits continuously
  +
  +# First if statement checks for for 2 conditions, 1 is if there are 6 digits, 2 is that there are no other separators than '-'
  +# Second try catch block checks if there is no character present in the string, as a string cannot be converted to int if
  +# it has characters, 2nd condition
  +# Thrid if checks for the 3rd condition
  +# Last if checks for the second part of the 1st Condition
  # Function which defines the params for validity of a credit card
  def credit_card_check(string):
  