increase a value exponentially

Hello,

I have a variable named speed. I want to increase the value of speed exponentially. How can I do this?

If tou really mean exponentially, you need Mathf.Pow(f, p);

float speed = Mathf.Pow(speed, p);

var speed : int ; //or double or whatever

speed += (speed);

OR you can go old school programmatic method and use

speed = (speed + speed);

EDIT…
-=
*=

etc are operator and Assign