**java.lang.Math ** class comes with many methods to do simple basic numeric operations. One such one is **pow()** method which returns power of a number raised to another number.

One advantage of** Math** class methods is that they are declared as **static** so that they can be called without the need of object creation.

Following is the **Math** class signature as defined in **java.lang** package.

**public final class Math extends Object**

Following is the signature of pow() method as defined in Math class.

**double pow(double a, double b):**Returns a double value of the first argument raised to the power of the second argument.

Notice, the method takes two double values and returns a double value.

The first argument, **a** is treated as the base and the second number,** b** is treated as exponential value; **a **raised to **b**.

###### Example on Power of Number Java Math pow() Function using of the above method.

```
public class MathFunctionDemo
{
public static void main(String args[])
{
System.out.println("\npow(2,3) is " + Math.pow(2, 3));
System.out.println("pow(-2,-3) is " + Math.pow(-2, -3));
System.out.println("pow(2.4,3.8) is " + Math.pow(2.4, 3.8));
System.out.println("pow(-2.4,-3.8) is " + Math.pow(-2.4, -3.8));
System.out.println("pow(2.0,0) is " + Math.pow(2.0, 0));
System.out.println("pow(2.0,1) is " + Math.pow(2.0, 1));
}
}
```

Output screenshot of Power of Number Java Math pow() Function

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S. Nageswara Rao, Corporate TrainerOne takes a string array object as parameter and one string object. First one is callback method and the second one you must call.

TapanSIR,

i am doing Hospital Management system project.

HOW to Generate UHID(universal Health ID) automatically by Java/J2ee and mysql.

UHID is used for uniqueness Patient ID.

plz reply with Answer immediately

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Thank u

S. Nageswara Rao, Corporate TrainerUse a mixture of uppercase, lowercase and digits. Decide the length.