If I have defined functions as "A1", "A2" ecc. then I have many function as A+number, can I define a For cycle to call these functions (they have all the same kind of arguments) once?

Something like

For[i<64, i == 0, i++, A"i"[]]

I don't know if it is possible.

  • $\begingroup$ Table[ToExpression @ StringTemplate["A``[]"] @ i, {i, 64}]. In general take a look at: 783 $\endgroup$
    – Kuba
    Commented Jan 8, 2018 at 15:32
  • 2
    $\begingroup$ Why not define these functions as A[1], A[2] etc.? $\endgroup$
    – evanb
    Commented Jan 8, 2018 at 15:40
  • $\begingroup$ Thank you both, I have defined these functions as A[1] ecc... Now I am satisfied! $\endgroup$ Commented Jan 8, 2018 at 16:06

1 Answer 1


You can use Symbol function. For example:

For[i = 0, i < 64, i++, Symbol[StringTemplate["A``"]@i][]]

Perhaps it will be faster than ToExpression. Also you can use auxiliary function:

A[i_] := A[i] = Symbol@StringTemplate["A``"]@i

For[i = 0, i < 64, i++, A[i][]]

Previously calculated A[i_] results (symbols) are "cached" by A[i_] := A[i]=....

IMHO best way is to define array (or SparseArray) of functions. Then you can call functions directly by index without extra symbol lookup.


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