Forms often allow a user to enter an integer. write a program that takes in a string representing an integer as input, and outputs your input contains only digits if every character is a digit 0-9. otherwise, your program outputs your input contains more than just digits ex: if the input is 1995, the output is: your input contains only digits ex: if the input is 42,000 or 1995! , the output is: your input contains more than just digits