Simple Arduino double-to-string function

Because Arduino language is rather low-level (C-based), such a function is not so straightforward or available as one might think.

I could not find this in the libraries or a simple solution online, so I made one on my own, and I think it is quite general and handy.

Just input the double and the number of decimal places desired. The function:

//Rounds down (via intermediary integer conversion truncation)

String doubleToString(double input,int decimalPlaces){

if(decimalPlaces!=0){

String string = String((int)(input*pow(10,decimalPlaces)));

if(abs(input)<1){

if(input>0)

string = "0"+string;

else if(input<0)

string = string.substring(0,1)+"0"+string.substring(1);

}

return string.substring(0,string.length()-decimalPlaces)+"."+string.substring(string.length()-decimalPlaces);

}

else {

return String((int)input);

}

}