- 01Setting up (what you'll need)
- 02Your first output (println!)
- 03Variables and mutability (let / mut)
- 04Type annotations and basic types
- 05Branching (the if statement)
- 06Repeating (the for loop)
- 07Writing your own function
- 08Repeating (while and loop)
- 09Ownership, the basics
- 10Borrowing (references, &)
- 11Working with vectors (Vec)
- 12Structs
- 13enum and the match expression
- 14The Option type (null safety)
- 15The Result type and error handling
- 16Traits
- 17Generics
- 18Closures
- 19Working with strings (String)
- 20[Project] Build a small inventory system
Branching (the if statement)
This lesson covers how to write an if statement in Rust.
if / else if / else branches on a condition. Unlike many other languages, Rust does not require parentheses around the condition.
The sample code uses if / else if / else to print one of three messages depending on score.
A common early stumble is the habit of wrapping the condition in (). If you have come from another language you will want to write if (score >= 80), but in Rust you write if score >= 80 without the parentheses.
In professional work, Rust's if also doubles as an expression, which makes conditional assignment to a variable pleasantly concise.
๐งช This site can't compile or run Rust directly, so it checks on the spot whether what you typed matches the reference code (scoring happens entirely in your browser โ nothing is sent anywhere).