// This is a comment, and is ignored by the compiler.// You can test this code by clicking the "Run" button over there ->// or if you prefer to use your keyboard, you can use the "Ctrl + Enter"// shortcut. // This code is editable, feel free to hack it!// You can always return to the original code by clicking the "Reset" button -> // This is the main function.fn main() { // Statements here are executed when the compiled binary is called. // Print text to the console. println!("Hello World!");}
// Unlike C/C++, there's no restriction on the order of function definitionsfn main() { // We can use this function here, and define it somewhere later fizzbuzz_to(100);} // Function that returns a boolean valuefn is_divisible_by(lhs: u32, rhs: u32) -> bool { // Corner case, early return if rhs == 0 { return false; } // This is an expression, the `return` keyword is not necessary here lhs % rhs == 0} // Functions that "don't" return a value, actually return the unit type `()`fn fizzbuzz(n: u32) -> () { if is_divisible_by(n, 15) { println!("fizzbuzz"); } else if is_divisible_by(n, 3) { println!("fizz"); } else if is_divisible_by(n, 5) { println!("buzz"); } else { println!("{}", n); }} // When a function returns `()`, the return type can be omitted from the// signaturefn fizzbuzz_to(n: u32) { for n in 1..=n { fizzbuzz(n); }}