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Java pow Function

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The Java pow Function is one of the Java Math Library function and it is used to calculate the Power of the specified expression.

In this article we will show you, How to write Math.pow function in Java Programming language with example.

Java pow Function syntax

The basic syntax of the Math.pow in Java Programming language is as shown below:

static double pow(double base, double Exponent); // Return Type is Double

//In order to use in Java program use following code
Math.pow(double base, double Exponent);
  • Base: Please specify the base value here.
  • Exponent: Please specify the Exponent value or power here.

For example, if x is base value and 2 is exponent then, Math.pow (x, 2) = x²

The Java Math.pow function will return the Base value raised to the power of Exponent value.

There are some special case where the result will be different and they are:

  • If the Exponent value is positive or negative zero, Math.pow in Java will return the result as 1.0.
  • If either the Base value or Exponent value argument is not a Number, Java Math.pow will return the result as NaN.
  • When the Absolute value of Base value is equal to one and the Exponent value is infinity, then Math.pow in Java returns the result as NaN.
  • If
    • the Absolute value of a Base value is greater than 1 and an Exponent value is positive infinity, or
    • Absolute of the Base value is less than one and the Exponent value is negative infinity, then the result is Positive Infinity.
  • If
    • the Absolute value of Base value is greater than 1 and the Exponent value is negative infinity, or
    • Absolute value of the Base value is less than 1 and an Exponent value is positive infinity, then the result is Positive Zero.
  • When
    • the Base value is positive zero & Exponent value is greater than zero, or
    • the Base value is positive infinity & Exponent value is less than zero, then the result is Positive Zero.
  • If
    • the Base value is positive zero and the Exponent value is less than zero, or
    • Base value is positive infinity & Exponent value is greater than zero, then the result is Positive Infinity.
  • If
    • the Base value is negative zero & the Exponent value is greater than zero but not a finite odd integer, or
    • Base value is negative infinity and an Exponent value is less than zero but not a finite odd integer, then Java Math.pow will return the result is Positive Zero.
  • When
    • the Base value is negative zero & Exponent value is positive finite odd integer, or
    • the Base value is negative infinity and an Exponent value is negative finite odd integer, then the result is Negative Zero.
  • If
    • the Base value is negative zero and the Exponent value is less than zero but not a finite odd integer, or
    • Base value is negative infinity and the Exponent value is greater than zero but not a finite odd integer, then the result is Positive Infinity.
  • If
    • the Base value of Java math pow function is negative zero and the Exponent value is negative finite odd integer, or
    • the Base value is negative infinity and the Exponent value is positive finite odd integer, then Java Math.pow will return the result is Negative Infinity.
  • The Base value of math pow java is finite & less than zero and
    • if the Exponent value is a finite even integer, the result is equal to the result of raising the absolute value of the Base value to the power of the Exponent value
    • Exponent value of math pow java is a finite odd integer, the result is equal to the negative of result of raising the absolute value of a Base value to the power of the Exponent value
    • and, if the Exponent value is finite and not an integer. Then Math.pow will return the result is NaN.

Java pow Function Example

The Java Math.pow function is used to return the Power of the given number.

In this example, We are going to find the power of both positive and negative double values and display the output

//Java Math.pow Function

package MathFunctions;

public class PowMethod {
	public static void main(String[] args) {
		double a = Math.pow((5.12 - 4.65 + 3.53), 3);
		System.out.println("Math.Expm1 Result = = " + a);	
		
		System.out.println("\nMath.pow Result for Zero as Second argument = " + Math.pow(2, 0));
		System.out.println("Math.pow Result for Zero as First argument = " + Math.pow(0, 2));

		System.out.println("\nMath.pow Result of Positive Number = " + Math.pow(2, 3));
		System.out.println("Math.pow Result of Positive Number = " + Math.pow(4, 2));
		
		System.out.println("\nMath.pow Result of Negative Number = " + Math.pow(-2, 3));
		System.out.println("Math.pow Result of Negative Number = " + Math.pow(3, -4));
	}
}

OUTPUT

Java pow Function 1

ANALYSIS

First, We declared variable a of type Double. Next, we used the Java Math.pow function directly on expression.

Here, we used System.out.println statement to print the result as output.

double a = Math.pow((5.12 - 4.65 + 3.53), 3);
System.out.println("Math.Expm1 Result = = " + a);

From the above statement, Math.pow((5.12 – 4.65 + 3.53), 3) ==> Math.pow(4, 3) ==> 64

Next, We used the Math.pow Java with one positive double value and other argument as zero.

System.out.println("\nMath.pow Result for Zero as Second argument = " + Math.pow(2, 0));
System.out.println("Math.pow Result for Zero as First argument = " + Math.pow(0, 2));

Here, We used the Java Math power Function directly on Positive double values.

System.out.println("\nMath.pow Result of Positive Number = " + Math.pow(2, 3));
System.out.println("Math.pow Result of Positive Number = " + Math.pow(4, 2));

Next, We used the Math.pow Function directly on Negative double values inside our print line statement.

System.out.println("\nMath.pow Result of Negative Number = " + Math.pow(-2, 3));
System.out.println("Math.pow Result of Negative Number = " + Math.pow(3, -4));

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