Instructions
In the code box is a function that determines whether a nonempty string starts with the letter "a".
Modify the function to return True if the string starts with "a" or "A".
Do not change the name of the function.
Note:
Hint:
- Make sure that
orjoins two Boolean expressions, not two strings.
Now modify your function to work correctly when the input is any type of data. Use short-cut evaluation to make sure that there is no error message.
You can check the type of a variable by seeing if its type is the same as the type of a constant. For example, to check if a variable x is an integer, you can use the expression type(x) == type(1).
Note:
Hint:
- Order the smaller expressions so that string functions are only performed on inputs that are strings.
Order the smaller expressions joined by and's in such a way that there is no error message for any type of input.
Note:
Hint:
- Make sure that numerical functions are only performed on inputs that are numbers.
Order the smaller expressions joined by or's in such a way that there is no error message for any type of input.
Note:
Hints:
- Do not use a string function on an input that is not a string.
Write a function even_int that consumes any type of data, produces True if it is an even integer, and produces False otherwise.
Note:
Hints:
- undefined
Write a function four_i that consumes any type of data, produces True if it is a string with the letter i (lower-case) in position 4 (index 3), and produces False otherwise.
Note:
Hint:
- Make sure that the string is long enough that looking at the character in position 4 does not result in an error.