BeginnersBook

  • Home
  • Java
    • Java OOPs
    • Java Collections
    • Java Examples
  • C
    • C Examples
  • C++
    • C++ Examples
  • DBMS
  • Computer Network
  • Python
    • Python Examples
  • More…
    • jQuery
    • Kotlin
    • WordPress
    • SEO
    • JSON
    • JSP
    • JSTL
    • Servlet
    • MongoDB
    • XML
    • Perl

Java Math.expm1() Method

By Chaitanya Singh | Filed Under: java

Java Math.expm1(double x) method returns ex – 1. Here, e is a Euler’s number, whose approximate value is 2.718281828459045.

public class JavaExample
{
  public static void main(String[] args)
  {
    double x = 1;
    // returns e (2.718281828459045) to power of 1 minus 1
    System.out.println(Math.expm1(x));
  }
}

Output:

1.718281828459045

Note: An interesting point to note is that for the values of x near 0, the sum of expm1(x) + 1 gives more accurate value of ex than exp(x) method.

Syntax of Math.expm1() method

Math.expm1(0); //returns 0.0

expm1() Description

public static double expm1(double x): Returns ex – 1.

expm1() Parameters

  • x: A double value that is the exponent in computation of ex – 1.

expm1() Return Value

  • Returns e raised to the power of given argument x, minus 1.
  • If the argument is NaN (Not a number), then it returns NaN.
  • If the argument is positive infinity, then it returns positive infinity.
  • If the argument is negative infinity, then it returns -1.0.
  • If the argument is zero, then it returns zero with the same sign.

Example 1

public class JavaExample
{
  public static void main(String[] args)
  {
    double x = 1, x2 = 10;
    System.out.println(Math.expm1(x));
    System.out.println(Math.expm1(x2));
  }
}

Output:

Java Math.expm1() Example Output_1

Example 2

public class JavaExample
{
  public static void main(String[] args)
  {
    double x = 2, x2 = -2, x3 = 0;
    System.out.println(Math.expm1(x));
    System.out.println(Math.expm1(x2));
    System.out.println(Math.expm1(x3));
  }
}

Output:

Java Math.expm1() Example Output_2

Example 3

public class JavaExample
{
  public static void main(String[] args)
  {
    double x = Double.NaN;
    double x2 = Double.MAX_VALUE;
    double x3 = Double.MIN_VALUE;
    System.out.println(Math.expm1(x));
    System.out.println(Math.expm1(x2));
    System.out.println(Math.expm1(x3));
  }
}

Output:

Java Math.expm1() Example Output_3

Recommended Posts

  • Java Math.toRadians()
  • Java Math.toDegrees()
  • Java Math.tanh()
  • Java Math.cosh()
❮ Java Math

Java Tutorial

Java Introduction

  • Java Index
  • Java Introduction
  • History of Java
  • Features of Java
  • C++ vs Java
  • JDK vs JRE vs JVM
  • JVM - Java Virtual Machine
  • First Java Program
  • Variables
  • Data Types
  • Operators

Java Flow Control

  • Java If-else
  • Java Switch-Case
  • Java For loop
  • Java while loop
  • Java do-while loop
  • Continue statement
  • break statement

Java Arrays

  • Java Arrays

OOPs Concepts

  • OOPs Concepts
  • Constructor
  • Java String
  • Static keyword
  • Inheritance
  • Types of inheritance
  • Aggregation
  • Association
  • Super Keyword
  • Method overloading
  • Method overriding
  • Overloading vs Overriding
  • Polymorphism
  • Types of polymorphism
  • Static and dynamic binding
  • Abstract class and methods
  • Interface
  • Abstract class vs interface
  • Encapsulation
  • Packages
  • Access modifiers
  • Garbage Collection
  • Inner classes
  • Static import
  • Static constructor

Java Exception Handling

  • Exception handling
  • Java try-catch
  • Java throw
  • Java throws
  • Checked and Unchecked Exceptions
  • Jav try catch finally
  • Exception Examples
  • Exception Propagation

Collections Framework

  • Collections in Java
  • Java ArrayList
  • Java LinkedList
  • Java Vector
  • Java HashSet
  • Java LinkedHashSet
  • Java TreeSet
  • Java HashMap
  • Java TreeMap
  • Java LinkedHashMap
  • Java Queue
  • Java PriorityQueue
  • Java Deque
  • Comparable interface
  • Comparator interface
  • Collections Interview Questions

MORE ...

  • Java Scanner Class
  • Java 8 Features
  • Java 9 Features
  • Java Conversion
  • Java Date
  • Java Multithreading
  • Java I/O
  • Java Serialization
  • Java Regex
  • Java AWT
  • Java Swing
  • Java Enum
  • Java Annotations
  • Java main method
  • Java Interview Q

Copyright © 2012 – 2022 BeginnersBook . Privacy Policy . Sitemap