Arithmetic Operators

Part of the Fundamentals section of Coddy's Rust journey — lesson 15 of 75.

Operators are used to perform operations on values.

First we will discuss the most basic arithmetic operators, they may be familiar from math classes.

Operator	Operation	Example
+	Addition	3 + 2 = 5
-	Subtraction	3 - 2 = 1
*	Multiplication	3 * 2 = 6
/	Division	4 / 2 = 2

Let's see usage example,

let a: i32 = 3;
let b: i32 = 5;
let c: i32 = a + b
// c holds 8

When working with decimal numbers in Rust, we use the f64 data type, which can store numbers with decimal points. The same arithmetic operators (+, -, *, /) work with f64 just like they do with integers:

let x: f64 = 3.3;
let y: f64 = 4.1;
let z: f64 = x + y;
// z holds 7.4

Challenge

Beginner

Write a code that initializes two variables, a and b, with the values 5.2 and 2.6 (respectively).

After that, initialize another variable c that will hold the result of a / b.

Cheat sheet

Arithmetic operators perform mathematical operations on values:

Operator	Operation	Example
+	Addition	3 + 2 = 5
-	Subtraction	3 - 2 = 1
*	Multiplication	3 * 2 = 6
/	Division	4 / 2 = 2

Using arithmetic operators with integers:

let a: i32 = 3;
let b: i32 = 5;
let c: i32 = a + b;
// c holds 8

Using arithmetic operators with decimal numbers (f64):

let x: f64 = 3.3;
let y: f64 = 4.1;
let z: f64 = x + y;
// z holds 7.4

Try it yourself

fn main() {
    // Type your code below
    
    
    // Don't change the line below
    println!("a = {}, b = {}, c = {}", a, b, c);
}

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction

Rust Hello World!Comments Basic Program Structure

4Operators Part 1

Arithmetic OperatorsModulo Operator Arithmetic Shortcuts Comparison Operators String Comparison

7Basic IO

Printing to Console Reading User Input Recap - Till 120 Recap - True or False

10Variable Bindings

Scope Shadowing Part 1 Variable Binding Shadowing Part 2

13Arrays Continued

Mutable Reference Arrays Array Methods Recap - Product Array Recap - Reversed Array Better Print

16Final Projects

Number Pattern Pattern Finder Student Grade Calculator

2Variables Part 1

Numbers Char String Boolean Mutable Variables

5Operators Part 2

Logical Operators Part 1 Logical Operators Part 2 Recap - Simple Logic Logical Operators Part 3

8Calculator App

Welcome Message Getting Numbers

Basic Operations

Formatted Output

11Functions

Declaring Functions Parameters and Arguments Return Values Multiple Return Values Recap - Sigma Function Recap - Validation Function

14Iterating Over Arrays

Range Guide Enhanced For Loop Borrow In Loop Common Array Operations

3Variables Part 2

Type Declaration Naming Conventions Type Inference Recap - Initialize Variables Type Casting

6Decision Making

If Expressions If-Else Match Statement Recap - If Else Nested If - Else

9Loops

For Over Series While Loop Break Continue Nested Loop Loop Labels Infinite Loop Recap - Dynamic Input

12Arrays Basics

Declaring Arrays Array as Parameter Accessing Elements Modifying Arrays Recap - Pretty Print Array

15String Operations

String Methods format! Macro String Conversion Recap - Format