fizzbuzz interview question

src/main.rs

@@ -1,10 +1,28 @@
 fn main() {
-    let s1: &str = "Hello";
-    println!("s1: {s1}");
-
-    let mut s2: String = String::from("Hello");
-    println!("s2: {s2}");
-
-    s2.push_str(s1);
-    println!("s2: {s2}");
+    fizzbuzz_to(20); // defined below. No forward declaration needed.
+}
+
+fn is_divisible_by(lhs: u32, rhs: u32) -> bool {
+    // returns a boolean
+    if rhs == 0 {
+        return false;
+    }
+    return lhs % rhs == 0;
+}
+
+fn fizzbuzz(n: u32) -> () {
+    // this returns nothing, so '()'
+    match (is_divisible_by(n, 3), is_divisible_by(n, 5)) {
+        (true, true) => println!("fizzbuzz"),
+        (true, false) => println!("fizz"),
+        (false, true) => println!("buzz"),
+        (false, false) => println!("{n}"),
+    }
+}
+
+fn fizzbuzz_to(n: u32) {
+    // like above, but you can omit the '()'
+    for n in 1..=n {
+        fizzbuzz(n);
+    }
 }