Module 2: Variables And Types

Practice Tasks

Complete these tasks to reinforce what you learned in this module.

Task 1: Mutable counter

In the stub, declare a mutable variable count starting at 0, add 3 to it, then print its value.

Expected Output:

Hint: You need a variable that can be reassigned; the theory explains which keyword to use. Then add 3 and print it.

Starter Code:

task.rs

// Task 1: Mutable counter. See tasks/TASKS.md.

fn main() {
    // YOUR CODE HERE: let mut count = 0, add 3, print "count = 3"
    todo!("Implement mutable counter");
}

Task 2: Type annotation

Declare a variable value of type i32 with value 100, and print it.

Expected Output:

Hint: Rust lets you annotate the type after a colon in a let binding. Check the types section in the theory.

Starter Code:

task.rs

// Task 2: Type annotation. See tasks/TASKS.md.

fn main() {
    // YOUR CODE HERE: let value: i32 = 100, print "value = 100"
    todo!("Implement type-annotated value");
}