Java Math exp() method with Example

Last Updated : 06 Apr, 2018

The java.lang.Math.exp() returns euler’s number e raised to the power of a double value.

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.

Syntax :

public static double exp(double a)
Parameter : 
a : the exponent part which raises to e.

Returns :
the value e^a, where e is the base of the natural logarithms.

Example : To show working of java.lang.Math.exp() function

// Java program to demonstrate working 
// of java.lang.Math.exp() method 
import java.lang.Math; 
  
class Gfg { 
  
    // driver code 
    public static void main(String args[]) 
    { 
        double x = 3; 
          
        // when both are not infinity 
        double result = Math.exp(x); 
        System.out.println(result); 
  
        double positiveInfinity =  
               Double.POSITIVE_INFINITY; 
        double negativeInfinity =  
               Double.NEGATIVE_INFINITY; 
        double nan = Double.NaN; 
  
        // when 1 is NAN 
        result = Math.exp(nan); 
        System.out.println(result); 
  
        // when one argument is +INF 
        result = Math.exp(positiveInfinity); 
        System.out.println(result); 
  
        result = Math.exp(negativeInfinity); 
        System.out.println(result); 
    } 
} 

Output:

20.085536923187668
NaN
Infinity
0.0

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