Dynamic array and foreach loop

[Binarydepth via Digitalmars-d-learn]

On Sunday, 9 August 2015 at 00:22:53 UTC, Jay Norwood wrote:
> On Saturday, 8 August 2015 at 18:28:25 UTC, Binarydepth wrote:
>>> This is the new code :
>>>
>>> 	foreach(num; 0..liEle)	{//Data input loop
>>>
>>> 		write("Input the element : ", num+1, " ");
>>> 		readf(" %d", &liaOrig[num]);
>>> 	}
>>
>> Even better :
>>
>> foreach(num; 0..liaOrig.length
>
> I believe they usually do something like:
>
> foreach( num, ref elem; liaOrig){
>
> }
>
> which creates the index num and the reference to the element of 
> range liaOrig.
>
> It also seems that a lot of discussion is going on about 
> reducing use of foreach loops in their preferred style, so you 
> might want to try some of that.

So I should use the REF like this ?

import std.stdio : writeln;
void main()     {
         immutable a=5;
         int[a] Arr;
         foreach(num; 0..a)      {
                 Arr[num] = num;
         }
         foreach(num, ref ele; Arr)      {
                 writeln(Arr[ele]+1);//Using the REF
         }
}