Merge pull request #12 from akshitgautam42/Ex-13

Exercise 13

exercises/02_functions/functions5.rs

@@ -3,13 +3,13 @@
 // Execute `rustlings hint functions5` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+
 
 fn main() {
-    let answer = square(3);
+    let answer:i32 = square(3);
     println!("The square of 3 is {}", answer);
 }
 
 fn square(num: i32) -> i32 {
-    num * num;
+    (num * num)
 }