In this example you will learn about how to calculate power in java.

## Java POWER Calculation

In this example you will learn about how to calculate power in java.

In Mathematics calculating power is means multiply a number, called 'base' number of times by another number, called exponent i.e. if there are two numbers 'X' and Y then it is denoted as XY or read as Y is raised to the power of X.

Example :

Power.java

```import java.util.Scanner;

public class Power
{
static double power;
public static double pow(double bs, double pw)
{
if((bs>0.0 && pw==0.0) || bs<0.0 && pw==0.0)
return 1;
else if(bs>0.0 && pw>0.0)
{
power = bs*pow(bs,pw-1);
return power;
}
else if(bs>0.0 && pw<0.0)
{
power = 1/bs*pow(bs, pw+1);
return power;
}
else if(bs<0.0 && pw>0.0)
{
power = (bs)*pow(bs,pw-1);
return power;
}
else
{
power = 1/bs*pow(bs, pw+1);
return power;
}
}
public static void main(String args[])
{
double pw;
Power p = new Power();
Scanner scan = new Scanner(System.in);
System.out.println("Enter base number");
double a = scan.nextDouble();
System.out.println("Enter the exponent number");
double b = scan.nextDouble();
pw = p.pow(a, b);
System.out.println(pw);
}
}```

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