Java.lang.Math.exp() Method


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Description

The java.lang.Math.exp(double a) returns Euler's number e raised to the power of a double value. Special cases:

  • If the argument is NaN, the result is NaN.

  • If the argument is positive infinity, then the result is positive infinity.

  • If the argument is negative infinity, then the result is positive zero.

The computed result must be within 1 ulp of the exact result. Results must be semi-monotonic.

Declaration

Following is the declaration for java.lang.Math.exp() method

public static double exp(double a)

Parameters

  • a -- the exponent to raise e to.

Return Value

This method returns the value ea, where e is the base of the natural logarithms.

Exception

  • NA

Example

The following example shows the usage of lang.Math.exp() method.

package com.tutorialspoint;

import java.lang.*;

public class MathDemo {

   public static void main(String[] args) {

   // get two double numbers
   double x = 5;
   double y = 0.5;

   // print e raised at x and y
   System.out.println("Math.exp(" + x + ")=" + Math.exp(x));
   System.out.println("Math.exp(" + y + ")=" + Math.exp(y));
   }
}

Let us compile and run the above program, this will produce the following result:

Math.exp(5)=148.4131591025766
Math.exp(0.5)=1.6487212707001282

java_lang_math.htm

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