Floating point types in Rust - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a 32-bit floating point variable.

Rust

let pi: [1] = 3.14f32;

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Achar

Bi32

Cbool

Df32

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer types like i32 for floating point numbers.

Using boolean or character types for numbers.

The f32 type is used for 32-bit floating point numbers in Rust.

2fill in blank

medium

Complete the code to declare a 64-bit floating point variable.

Rust

let e: [1] = 2.71828;

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Ausize

Bi64

Cf64

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer types like i64 instead of floating point.

Confusing usize with floating point types.

The f64 type is used for 64-bit floating point numbers in Rust.

3fill in blank

hard

Fix the error in the code by choosing the correct floating point type.

Rust

let gravity: [1] = 9.81;

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Af64

Bf128

Cint

Dstr

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent types like f128 or int.

Using string types for numbers.

Rust supports f32 and f64 for floating point types. f64 is the correct 64-bit type.

4fill in blank

hard

Fill both blanks to create a vector of 32-bit floating point numbers.

Rust

let numbers: Vec<[1]> = vec![1.0f32, 2.0f32, 3.0f32];
let first: [2] = numbers[0];

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Af32

Bi32

Cf64

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing integer and floating point types.

Using f64 when the vector is f32.

The vector holds f32 values, so the variable first must also be f32.

5fill in blank

hard

Fill all three blanks to create a function that returns a 64-bit floating point number.

Rust

fn calculate_area(radius: [1]) -> [2] {
    let pi: [3] = 3.14159;
    pi * radius * radius
}

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

Af32

Bf64

Di32

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing f32 and f64 types.

Using integer types for floating point calculations.

The function uses f64 for the parameter, return type, and constant pi for precision.