Declaring Variables

Declaring variables in programming is a fundamental concept that allows you to store and manipulate data. Variables are used to store values that can be accessed and modified throughout the program.

In Rust, variables are declared using the let keyword followed by the variable name and an optional type annotation.

In Rust, variables are immutable by default. This means that once a value is bound to a variable, it cannot be changed. This is a key feature of Rust that helps ensure safety and prevent bugs by avoiding unexpected changes to values.

Your task

In this challenge, you will declare and use immutable variables in Rust. You will be given a function where you need to declare variables and use them to perform specific operations. The goal is to get comfortable with the concept of immutability and understand how to use immutable variables effectively.

Your task is to define two immutable variables inside the function using the let keyword:

width with a value of 10
height with a value of 5

Then, calculate the area of a rectangle using the formula area = width * height and return the calculated area.

Requirements

Declare two immutable variables, width and height, and assign them values.
Calculate the area of the rectangle using the formula width * height.
Return the calculated area.

Hints

Use the let keyword to declare variables.
Remember that variables declared with let are immutable by default.
Use multiplication * to calculate the area.

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Solutions

Jake Hernandez

jakehz

2 hours ago

6.97ms

92.90kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    return width * height;
}

Amilcar Rey

amilcarrey

4 hours ago

3.69ms

92.90kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    return width * height;
}

qiyuan711

6 hours ago

4.78ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Elizabeth Doughty

Thymelizabeth

6 hours ago

24.67ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Sean Benson

SCBenson

10 hours ago

3.65ms

93.71kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

Jan

jeypiti

10 hours ago

4.60ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

plasitol

Plasitol

15 hours ago

5.08ms

93.71kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

s.konishi

konishu

16 hours ago

3.83ms

93.05kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    return width * height;
}
// pub fn calculate_area() -> u32 {
//     // TODO: Implement the function here
//     // Declare width and height as immutable variables
//     // Calculate the area of the rectangle
//     // Return the calculated area
//     let width = 10;
//     let height = 5;
//     let area = width * height;
//     return area 
// }

Tony

YoNoSoyTony

a day ago

4.86ms

92.47kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    width * height
}

nichideropa

a day ago

4.21ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Jadoski™

oelun-in

a day ago

3.69ms

93.63kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width =10 ;
    let height =5 ;
    let area = width * height ;
    area
}

akshayabhattarai

a day ago

5.62ms

93.91kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    // width * height
    let area =  width * height;
    return area;
}

aleksey-vareto

a day ago

3.69ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    let width = 10;
    let height = 5;
    width * height
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
}

hatchepsut

a day ago

3.76ms

92.47kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    width * height
}

oDqnger

a day ago

4.32ms

92.47kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    width * height
}

M4dPac

2 days ago

5.43ms

92.47kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    
    width * height
}

martin-unit

2 days ago

4.38ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Takuro Niitsuma

otakumesi

2 days ago

3.60ms

93.89kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

matsumura-y1

2 days ago

6.19ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

kada-s

sy34

2 days ago

4.04ms

93.89kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

Kohei Matsubara

matsuby

2 days ago

3.93ms

93.71kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

matsuyama-k1

2 days ago

3.48ms

92.90kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    return width * height;
}

Ankeet Parikh

ankeetparikh

2 days ago

17.93ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

KuTaKe

kuttakke

2 days ago

3.70ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

aidan1magee

2 days ago

4.07ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

devarajang

2 days ago

4.09ms

93.71kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

maxvi

2 days ago

4.35ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Aidar Shagiyev

Aidar-Shagiyev

2 days ago

4.13ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

T4D4

T4D4-IU

2 days ago

3.84ms

93.89kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

Johan Alexis Duque Cadena

johandroid

2 days ago

3.76ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height =5;
    width*height
}

PickAUsername

Skul1CrowN

2 days ago

4.16ms

93.71kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

Derteq

2 days ago

3.58ms

92.47kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    width * height
}

Yofifi

3 days ago

7.55ms

93.63kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    let area = width * height;
    area
}

Rayen Benbetaieb

P0TER19

3 days ago

3.84ms

93.85kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let height=5;
    let width=10;
    let area = height * width;
    return area
}

0xsmarter

3 days ago

5.71ms

93.89kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width =  10;
    let height = 5 ;
    let area = width * height;
    return area;
}

Walquer Xavier Valles Ruiz

WalquerX

3 days ago

4.14ms

92.87kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    return width * height
}

woke-developer

3 days ago

3.92ms

93.45kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    let area = width * height;
    area
}

meowyaga

3 days ago

5.01ms

93.67kb

pub fn calculate_area() -> u32 {
    let width = 10; let height = 5;
    let area = width * height;
return area}

Rafael Lucas

rafaellucasprogm

3 days ago

4.12ms

93.63kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    let area = width * height;
    area
}

koslowskio

3 days ago

4.15ms

92.86kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width=10;
    let height=5;
    return width*height
}

Rocky.C

cloki0610

3 days ago

4.36ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Denis SOURON

Brack0

4 days ago

3.44ms

92.47kb

pub fn calculate_area() -> u32 {
    let width = 10;
    let height = 5;
    width * height
}

Hudson

dalprahcd

4 days ago

3.77ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

tsuchiya-d

tsucchinoko

4 days ago

4.31ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Samori Gorse

shinuza

4 days ago

3.72ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Prajval Malhotra

prajval-malhotra

4 days ago

5.88ms

92.90kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    return width * height;
}

Sabin Howard

whitwulf

4 days ago

5.27ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

storiumi

4 days ago

3.98ms

93.89kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    let area = width * height;
    return area;
}

Ugochukwu Paul

ugochukwudev

4 days ago

3.76ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}

Ugochukwu Paul

ugochukwudev

4 days ago

4.66ms

92.64kb

pub fn calculate_area() -> u32 {
    // TODO: Implement the function here
    // Declare width and height as immutable variables
    // Calculate the area of the rectangle
    // Return the calculated area
    let width = 10;
    let height = 5;
    width * height
}