Now trigger this error:
```
error: expected type, found `)`
--> exercises/functions/functions2.rs:10:16
|
10 | fn call_me(num:) {
| ^ expected type
```
|
||
|---|---|---|
| .. | ||
| functions1.rs | ||
| functions2.rs | ||
| functions3.rs | ||
| functions4.rs | ||
| functions5.rs | ||
| README.md | ||
Functions
Here, you'll learn how to write functions and how Rust's compiler can trace things way back.