• blizzard (10/10) Jul 18 2020 ```
• rikki cattermole (5/7) Jul 18 2020 The brackets are optional when calling a function. You are not calling a...

blizzard <bliz zar.d> writes:

```
import std.stdio;

void main()
{
     writeln(typeof(readln()).stringof); // string
     writeln(typeof(readln).stringof); // void
}
```
Can anybody explain the difference between readln() and readln? I 
read somewhere that the () were optional, so why this difference?

rikki cattermole <rikki cattermole.co.nz> writes:

On 18/07/2020 9:14 PM, blizzard wrote:
 Can anybody explain the difference between readln() and readln? I read 
 somewhere that the () were optional, so why this difference?

The brackets are optional when calling a function. You are not calling a 
function if you wrap it in typeof.

"The Expression is not evaluated, it is used purely to generate the type:"

https://dlang.org/spec/declaration.html#Typeof