Java Math exp() method with Example

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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