Hi all,

I have a program that measures angles - positive and negative. I’d like to raise them to a power but maintain their sign when I use them later. To be clear, I need .5 degrees to be squared to .25… 2 becomes 4… but I also want -.5 to become -.25… -2 returns -4… etc. We all know that a negative times a negative is a positive and naturally the built in “pow” function always returns positive when given a negative base value. I have been trying all night to write a simple function to handle this for me: By taking 2 floating inputs (a base and an exponent), checking if the base is < 0 and setting a int variable called “sign” to -1. Later in the function (after the power has been found) the result of pow gets multiplied by sign to return it to the correct polarity. I’ve tried a dozen different permutations of the code below but the result is always the same… positive result return correctly, anything that results in a negative result returns 0.00. This includes manually multiplying “result” by -1 or removing the “if” code and initializing sign to -1. I need a second opinion:

```
void setup() {
Serial.begin(115200); //Initialize Serial Port
}
void loop() {
double newval = scale(2.0,2.0);
Serial.println(newval);
delay(200);
}
double scale(float input, float factor)
{
int sign = 1.0;
if (input < 0.0){
sign = -1.0;
}
double result = pow(input, factor);
result = result * sign;
return result;
}
```