I have a webhook response coming back as a float as shown below.
I’m trying to use this handler function to turn that into a float variable:
But this always returns this in the serial terminal:
I got this from a @rickkas7 example shown below but maybe I am misunderstanding something.
How do best get this float data pushed into a variable?
what happens when you just print data?
what happens when you declare BTCprice as a double?
double BTCprice = atof(data);
It didn't work.
I ended up setting this a Global Variable:
String BTClatest;
And then using this in the webhook handler:
void myHandler(const char *event, const char *data) { // This is called when the Photon receives the webhook data.
BTClatest = String(data); // Get the latest price of Bitcoin
}
It may not be best but it's working for now which feels better than it not 
Have you tried that?
It's a vital step to understand what's happening before being able to answer this
Best print with some means to judge whether there are any non-visible characters embedded.
atof() should work. If it doesn't there's probably something wrong with the incoming data.
And as you know, Strings ...
Why not use char BTClatest[16] and strncpy(BTClatest, data, sizeof(BTClatest) -1)?
However your original issue is probably that you are originally declaring float BTCprice; as a local variable which will vanish as soon you leave the function your global version of it will never be updated.
Of course your right 
The serial prints look like this:
So I'm getting the Quotes before and after the number.
That explains why the atof() was not working
I had the " " accidentally added to my webhook response template. I removed them and now I only get the digits 
This short but sweet line of code works perfectly now for pushing the webhook response into the Global float variable!
BitCoinSpotPrice = atof(data);
Thanks for helping me figure this out 