Average function using Variadic Functions method

[pascal111]

On Tuesday, 2 November 2021 at 16:29:07 UTC, rikki cattermole 
wrote:
> You probably don't want to be using C variadics.
>
> Instead try the typed one:
>
> float mean(float[] input...) {
> 	// you don't want to divide by zero
> 	if (input.length == 0)
> 		return 0;
>
> 	float temp = 0;
> 	// floats and double initialize to NaN by default, not zero.
> 	
> 	foreach(value; input) {
> 		temp += value;
> 	}
>
> 	return temp / input.length;
> }

"input..." seems nice, where can I get more information about it?