PART E: FLOAT CHECK

String has a method s.isdigit() that returns True if string s contains only digits and False otherwise, i.e. s is a string that represents an integer. Write a function named float_check that takes one parameter that is a string and returns True if the string represents a float and False otherwise. For the purpose of this function we define a float to be a string of digits that has at most one decimal point. Note that under this definition an integer argument will return True. Remember \"edge cases such as 45. or .45; both should return True.

For example:

float_check ('1234') returns True

float_check ('123.45') returns True

float_check ('123.45.67') returns False

float_check ('34e46') returns False

float_check('.45') returns True

float_check ('45.') returns True

float_check ('45..') returns False