I got this small code I'm trying things on for like an hour.

int receivers = 0;
#if defined(PPM_RECEIVER)

And I just cannot get it working, It keeps returning a "'receivers' does not name a type" on line 4.

  • 2
    Question about C/C++ syntax. This is counted as off topic on Arduino SE.
    – MichaelT
    Commented May 16, 2019 at 20:20
  • Maybe you mistyped receivers; did you copy-paste the code here or rewrote it? Of course then this code is written inside a function, isn't it?
    – frarugi87
    Commented May 21, 2019 at 6:52

1 Answer 1


You can't use commands like receivers++ outside of a function. That is runtime executable code, and has to be run from inside a function. Global scope doesn't get executed in the same way as code in a function.

  • Ah that makes sense, Thank you!
    – user56727
    Commented May 16, 2019 at 17:55

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