Rust functions
From wikinotes
Expressions vs Statements
- statements include actions without a return value (ends in ;)
- expressions include actions with a return value (no ;)
statement
{ let y = 1; y += 1; } // no return valexpression
let x = { let y = 1; y += 1 // <-- no semicolon } // returns 2
Function Signatures
fn main() { // returns void println!("hi"); } fn main() i32 { // returns 123 123 // <-- no semicolon } fn main(num: u8) { // param type println!("{num}"); }