The pow() method returns the result of the first argument raised to the power of the second argument.
Example
class Main {
public static void main(String[] args) {
// computes 5 raised to the power 3
System.out.println(Math.pow(5, 3));
}
}
// Output: 125.0
Syntax of Math.pow()
That is, pow(a, b) = ab
The syntax of the pow() method is:
Math.pow(double num1, double num2)
Here, pow() is a static method. Hence, we are accessing the method using the class name, Math.
pow() Parameters
The pow() method takes two parameters.
- num1 - the base parameter
- num2 - the exponent parameter
pow() Return Values
- returns the result of num1num2
- returns 1.0 if num2 is zero
- returns 0.0 if num1 is zero
Note: There are various special cases for the pow() method. To learn about all the special cases, visit Java Math.pow() Special Cases (Official Java Documentation).
Example: Java Math pow()
class Main {
public static void main(String[] args) {
// create a double variable
double num1 = 5.0;
double num2 = 3.0;
// Math.pow() with positive numbers
System.out.println(Math.pow(num1, num2)); // 125.0
// Math.pow() with zero
double zero = 0.0;
System.out.println(Math.pow(num1, zero)); // 0.0
System.out.println(Math.pow(zero, num2)); // 1.0
// Math.pow() with infinity
double infinity = Double.POSITIVE_INFINITY;
System.out.println(Math.pow(num1, infinity)); // Infinity
System.out.println(Math.pow(infinity, num2)); // Infinity
// Math.pow() with negative numbers
System.out.println(Math.pow(-num1, -num2)); // 0.008
}
}
In the above example, we have used the Math.pow() with positive numbers, negative numbers, zero, and infinity.
Here, Double.POSITIVE_INFINITY is used to implement positive infinity in the program.
Note: When we pass an integer value to the pow() method, it automatically converts the int value to the double value.
int a = 2;
int b = 5;
Math.pow(a, b); // returns 32.0