how to get the value from particular index will be given in array

how to get the multiple value from in the array through index value

I have array which contain multiple values A1=

    12
    23
    50
    61
    74
    92

but i have another array which contain the index value of Array A1 is called Array A2=

   2
   3
   5

now i wish to take the A3 array which contain only that A1 values which index will be present in A2.

Answer 1

[Star Strider]

If I understand correctly, I believe this is what youwant:

A3 = A1(A2)

produces:

A3 =

      23
      50
      74