How to get the array elements indexes

Hello Sir/Mada, I have matrix:

A=[2 9 0 3]
and I want to get Index_A=[1 2 3 4]
I used "find"
I got the answer (which is not I required),here it didn't considered "Zero" It is only considering non zero elements. Kinldy help How to I get the indexes including zero elemets.

I used this code:

>> A=[2 9 0 3]

A =

       2     9     0     3

>> Index_A=find(A)

Index_A =

       1     2     4

Many many thanks in advance.

[Stephen23]

>> 1:4
ans =
      1   2   3   4

[the cyclist]

You might want to check out some of the free, online resources available for learning MATLAB. Here is one place to get started.

Answer 1

[the cyclist]

Index_A = 1:numel(A)