Constants

In Rust, constants are values that are bound to a name and are not allowed to change. Constants are always immutable and are declared using the const keyword. They must be annotated with their type, and they can be set only to a constant expression.

In this challenge, you will define and use a constant in Rust. This will help you understand how to declare constants and how they can be utilized in your programs.

Your task

Define a constant named MAX_SIZE with a value of 100.
Ensure that MAX_SIZE has the type i32.
Return the value of MAX_SIZE from the main function.
Make sure you make the constant public using the pub keyword (important for the tests to pass).
Remember that constants can only be defined at the global scope. You can not define them inside a function.

Hints

Use the const keyword to define the constant.
Ensure you specify the type of the constant explicitly.

Editor not available on Mobile!

In order to solve the challenge, please visit this page on a desktop computer.

Solutions

Hari haran

hariFED

28 minutes ago

2.82ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

It5Duck

an hour ago

3.11ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    return MAX_SIZE;
}

CharlieBrown1-2

4 hours ago

2.80ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    return MAX_SIZE;
}

Faruk

aafeke

5 hours ago

3.06ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

natheumowitz-code

6 hours ago

2.57ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Matt Oldham

matt-o-zetland

10 hours ago

3.42ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    return MAX_SIZE
}

Camden

CamdenForbes

a day ago

3.33ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Omxd147

a day ago

3.38ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Eliettetheegeek

a day ago

2.85ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

m0rnin

a day ago

2.58ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

alexsmith82

a day ago

3.68ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

mwheeleraus

a day ago

2.60ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Abeautifulsnow

a day ago

2.54ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

learning-me

2 days ago

2.82ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Hussein Aprianto

HusseinHato

2 days ago

2.52ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Monsler

2 days ago

2.76ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Martin He

martin-he543

2 days ago

3.11ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Harikrishnan B

harihkim

2 days ago

2.91ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    return MAX_SIZE;
}

Hariom

om-secadvice

3 days ago

2.84ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Igor Kovacevic

ikovacevic

3 days ago

3.50ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

brubsby

3 days ago

3.35ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Zorah

ZorahScope

3 days ago

2.76ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

PreppyMiguel

lusuo9

3 days ago

2.68ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE :i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

T4D4

T4D4-IU

3 days ago

2.69ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Islam Elsayed

Elsayed91

3 days ago

2.73ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    
    return MAX_SIZE
}

Loki

Loki-101

4 days ago

2.76ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Piotr Baranowski

piotrbar250

4 days ago

4.28ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Taufiq Hisyam

ozmydas

4 days ago

3.11ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE : i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Ivo Kovac

kovacivo

4 days ago

2.74ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

M1NDB3ND3R

Tharun-DV

4 days ago

3.43ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

lavapool

wpoolw

4 days ago

2.58ms

86.04kb

pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

jstickn

4 days ago

2.77ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE : i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

khadre07

4 days ago

3.04ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    return MAX_SIZE;
}

Kourosh Mozafari

kmozafari

4 days ago

3.66ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Sukemcute

5 days ago

2.70ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
pub const MAX_SIZE:i32 = 100;
// NOTE: Define the constant outside the main function
// Your code here
pub fn main() -> i32 {
    MAX_SIZE
}

azmahflameheart

5 days ago

2.77ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

NAULINALBAN

5 days ago

2.59ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE : i32 = 100;
pub fn main() -> i32 {
    return MAX_SIZE;
}

masterdpro0

5 days ago

2.65ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Ayoola Oluwafemi

Osuolale1

5 days ago

2.60ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE 
}

Álex Frías

alexwebdev05

5 days ago

2.50ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Amlezia

5 days ago

2.46ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    return MAX_SIZE
}

Agon Dise

AgonDise

5 days ago

2.58ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

emiludenz

5 days ago

3.66ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE:i32 = 100; 
pub fn main() -> i32 {
    MAX_SIZE
}

GluconFix

gluconfix

6 days ago

2.99ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
pub const MAX_SIZE: i32 = 100;
// NOTE: Define the constant outside the main function
// Your code here
pub fn main() -> i32 {
    MAX_SIZE
}

LawisChen

6 days ago

3.64ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Clement

kekopom

6 days ago

2.71ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Ludovic Frérot

leludo

6 days ago

2.70ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// The constant must have the keyword pub to be seen by the main function outside of it
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Egu0

egu0

6 days ago

3.22ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Kostya

GaldyPoper

6 days ago

3.13ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE: i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}

Platinwing

7 days ago

2.82ms

86.04kb

// Define a constant MAX_SIZE with a value of 100.
// NOTE: Define the constant outside the main function
// Your code here
pub const MAX_SIZE : i32 = 100;
pub fn main() -> i32 {
    MAX_SIZE
}