functions.rs
//! Documentation (support markdown)
//!
//! # Function
//!
//! ```
//! assert_eq!(42, function(42))
//! fn function(arg: i32) -> i32 {
//! // do something
//! return arg;
//! }
//! ``
fn function(arg: i32) -> i32 {
// do something
return arg;
}
// example (return statement is optional)
fn power(x: i32, n: i32) -> i32 {
let mut result: i32 = 1;
// multiply x with itself n times
for _i in 1..n {
if result == 1 {
result = x * x;
} else {
result *= x;
}
}
result
}
fn main() {
println!("{:?}", function(42)); // 42
println!("{:?}", power(2, 3)); // 8
}