Boolean type in Rust - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a boolean variable named is_active with the value true.

Rust

let is_active: bool = [1];

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A"true"

BTrue

Ctrue

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase True instead of lowercase true

Using 1 or "true" as boolean values

In Rust, the boolean type is bool and the values are true or false (all lowercase).

2fill in blank

medium

Complete the code to assign the result of a comparison to a boolean variable.

Rust

let is_equal: bool = 5 [1] 3;

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A==

B!=

C=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using single = instead of == for comparison

Using != which checks for inequality

The == operator checks if two values are equal and returns a boolean.

3fill in blank

hard

Fix the error in the boolean expression to check if x is less than 10.

Rust

let x = 7;
let is_less = x [1] 10;

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

A<=

B<

C=>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= which means less than or equal

Using => which is invalid syntax

The operator < checks if x is less than 10.

4fill in blank

hard

Fill both blanks to create a boolean expression that checks if num is between 1 and 10 (inclusive).

Rust

let num = 5;
let in_range = num [1] 1 && num [2] 10;

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

A>=

B<

C<=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of >= for the lower bound

Using < instead of <= for the upper bound

The expression checks if num is greater than or equal to 1 and less than or equal to 10.

5fill in blank

hard

Fill all three blanks to create a boolean expression that checks if value is not equal to 0, less than 100, and greater than 50.

Rust

let value = 42;
let valid = value [1] 0 && value [2] 100 && value [3] 50;

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

A!=

B<

C>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using == instead of != for the first condition

Mixing up < and > operators

The expression checks that value is not zero, less than 100, and greater than 50.