Rust Platform

Control Flow

Level: intro (score: 1)

🎯 Both Python and Rust support if/elif/else (Python) or if/else if/else (Rust). Both now also have a powerful match expression for pattern matching.

Key differences for Pythonistas:

• if in Rust is an expression: it returns a value.
• match lets you handle multiple patterns exhaustively.

✅ Your task:

Implement grade_message(score: i32) -> String:

• If score >= 90, return "Excellent".
• If score >= 75, return "Good".
• If score >= 50, return "Pass".
• Otherwise, return "Fail".

Then use match on the first letter of the result to:

• Return "Top" if it starts with E
• "Decent" if G
• "Basic" if P
• "None" otherwise

Return the final match result.

💡 Hint:

• if/elif/else returns the value of the executed branch.
• match must cover all cases (_ works as the fallback).

Example:

assert_eq!(grade_message(95), "Top");
assert_eq!(grade_message(78), "Decent");
assert_eq!(grade_message(52), "Basic");
assert_eq!(grade_message(10), "None");