Types in Depth

Types in Depth

In this lesson — part of Data Deep Dive — you'll learn types in depth in Rust and why it matters in real work.

Why it matters

Types tell you what operations make sense and catch whole classes of bugs early.

Key ideas

• Common types: text, numbers, booleans
• Type conversion and coercion
• When to be explicit about types
• Type errors and how to read them

In practice

Here's how it looks in idiomatic Rust:

let int: i32 = 42;
let float: f64 = 3.14;
let flag: bool = true;
let ch: char = 'R';        // a Unicode scalar, 4 bytes
let as_float = int as f64; // explicit numeric cast
println!("{int} {float} {flag} {ch} {as_float}");

Rust note: Rust never implicitly converts numeric types — you must cast with as (or TryFrom for fallible conversions), which makes precision loss explicit.

Try it yourself

Exercise: In Rust, convert a number to text and back, and print both.

Recap

You now understand types in depth and can apply it in Rust. Mark this lesson complete and continue to the next one.