A library program for negative exponents.

Question

Ok im looking to create a program that can take a number and take that number to a negative exponent. such as this
2^(-2) = .25 this is what i would like to accomplish. heres what i have.
public static double power(double base, double expo)
//return 0 if either is negative
double result=1.0;
if (expo<0.0)
expo*=-1.0;
for(double x=expo;x>0.0;x--)
result=result*base;
result=1.0/result;
System.out.println(result);
//compute the power function
if(base<0.0)
{  for(double x=expo;x>0.0;x--)
{ result=(result)*(base);
System.out.println(result);
else
for(double x=expo;x>0.0;x--)
result=result*base;
System.out.println(result);
//return -1 if it gets too big
double almostToBig = 2147483647.0/base;
if(result > almostToBig)
return -1.0;
return result;
ive fooled around with the neg expo part a ton. That wasnt my best code but ive tried every combination i can think of to get it to work. Please let me know what i need to do.

Answer 1

Ummm, are you going to call this program ReinventTheWheel? Because there's already a java.lang.Math.pow(double, double) method built-in.