rust / beginner
Snippet
Defining and Calling Functions
Functions in Rust are defined with 'fn'. Parameters need type annotations. The return type is specified after '->'. Rust automatically returns the last expression. Functions can return multiple values using tuples.
snippet.rs
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fn greet(name: &str) -> String {format!("Hello, {}!", name)}fn calculate(x: i32, y: i32) -> (i32, i32, i32) {(x + y, x - y, x * y)}fn main() {let message = greet("World");println!("{}", message);let (sum, diff, product) = calculate(10, 3);println!("Sum: {}, Difference: {}, Product: {}", sum, diff, product);}
Breakdown
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fn greet(name: &str) -> String
Function taking a string slice, returning a String
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format!("Hello, {}!", name)
The last expression is implicitly returned
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fn calculate(x: i32, y: i32) -> (i32, i32, i32)
Returns a tuple of three i32 values
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let (sum, diff, product) = calculate(10, 3);
Destructures the returned tuple into three variables