Write is_weekend(day) that returns True if the given day name is Saturday or Sunday and False otherwise. The comparison must ignore letter case, so "sunday" and "SUNDAY" both count. Anything that is not a full day name (such as "Sat" or an empty string) is not a weekend.
Examples
Input: day = "Saturday"
Output: True
Input: day = "Monday"
Output: False
Input: day = "sunday"
Output: True
Constraints
dayis a string of at most 20 characters
Goals
- Compare strings with ==
- Return a real boolean
- Ignore letter case when comparing