Add Grade Calculator with Conditional Logic

[ghostrider2606]

Goal: Implement a Java console application that takes a student's numerical score as input and prints their corresponding letter grade (A, B, C, D, F) using if-else if statements.
Folder: Beginner
Technical Notes: The program should demonstrate simple user input using Scanner (wrapped in try-with-resources) and basic conditional logic.
Style Requirement: Requirement Must include the required Javadocs-style header with O(1) complexity noted.

[anukalp2804]

@ghostrider2606 can you please assign it to me i want to work on it.