Match overview in Rust - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a message based on the number using match.

Rust

let number = 1;
match number {
    [1] => println!("One"),
    2 => println!("Two"),
    _ => println!("Other"),
}

Drag options to blanks, or click blank then click option'

A0

B3

C4

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using a value that does not match the variable.

Forgetting to cover all cases with a wildcard.

The match arm for 1 matches the number 1 and prints "One".

2fill in blank

medium

Complete the code to match a character and print its type.

Rust

let c = 'a';
match c {
    [1] => println!("Vowel"),
    'b' | 'c' => println!("Consonant"),
    _ => println!("Other"),
}

Drag options to blanks, or click blank then click option'

A'e'

B'a'

C'd'

D'f'

Attempts:

3 left

💡 Hint

Common Mistakes

Using double quotes instead of single quotes for characters.

Matching a character not covered in the arms.

The match arm for 'a' matches the vowel character and prints "Vowel".

3fill in blank

hard

Fix the error in the match expression to correctly handle the boolean value.

Rust

let flag = true;
match flag {
    [1] => println!("True"),
    false => println!("False"),
}

Drag options to blanks, or click blank then click option'

Atrue

BTrue

C"true"

DTRUE

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase or quoted booleans.

Using a string instead of a boolean.

Boolean values in Rust are lowercase true and false.

4fill in blank

hard

Fill both blanks to match a tuple and print the correct message.

Rust

let pair = (0, -2);
match pair {
    ([1], [2]) => println!("Matched zero and negative number"),
    _ => println!("No match"),
}

Drag options to blanks, or click blank then click option'

A0

B1

C-2

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the tuple elements.

Using positive numbers instead of negative.

The tuple (0, -2) matches the pattern with first element 0 and second element -2.

5fill in blank

hard

Fill all three blanks to match an enum and print the correct message.

Rust

enum Direction {
    Up,
    Down,
    Left,
    Right,
}

let dir = Direction::Left;
match dir {
    Direction::[1] => println!("Going up"),
    Direction::[2] => println!("Going down"),
    Direction::[3] => println!("Going left"),
    _ => println!("Other direction"),
}

Drag options to blanks, or click blank then click option'

AUp

BDown

CLeft

DRight

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase variant names.

Mixing up the order of variants.

The match arms correspond to the enum variants Up, Down, and Left.