Compilation and execution flow in Rust - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, world!" in Rust.

Rust

fn main() {
    println!([1]);
}

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

AHello world

BHello, world!

C'Hello, world!'

D"Hello, world!"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the double quotes around the string.

Using single quotes instead of double quotes.

The println! macro requires a string literal inside double quotes to print text.

2fill in blank

medium

Complete the code to declare a variable named x with value 5.

Rust

fn main() {
    let [1] = 5;
    println!("{}", x);
}

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

Ax

Bvalue

Cnum

Dfive

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name than the one printed.

Forgetting to declare the variable.

The variable name must match the one used in println!, which is x.

3fill in blank

hard

Fix the error in the code to correctly add two numbers and print the result.

Rust

fn main() {
    let a = 3;
    let b = 4;
    let sum = a [1] b;
    println!("{}", sum);
}

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

Using an invalid operator.

The plus sign (+) adds two numbers in Rust.

4fill in blank

hard

Fill both blanks to create a loop that prints numbers from 1 to 5.

Rust

fn main() {
    for i in [1] [2] 6 {
        println!("{}", i);
    }
}

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

A1..

B1..=

C6..

D..

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1..=6 which includes 6 and prints 6 as well.

Using 6..1 which is an invalid range.

The range 1..6 includes numbers from 1 up to but not including 6, which prints 1 to 5.

5fill in blank

hard

Fill all three blanks to create a function that returns the square of a number.

Rust

fn square([1]: i32) -> i32 {
    [2] * [3]
}

fn main() {
    let result = square(4);
    println!("{}", result);
}

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

Anum

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inside the function.

Forgetting to return the multiplication result.

The function parameter and the multiplication both use the same variable name 'num' to calculate the square.