The java.lang.StrictMath.expm1() is an inbuilt method in Java which is used to return the exponential e^num -1 for a given value of num. The method gives rise to four different cases:
- The method returns NaN when the given argument is NaN.
- The result is positive infinity when the argument is positive infinity.
- The result is negative infinity when the argument is negative infinity.
- For 0 the methods return 0 with the same sign as the argument.
Syntax :
public static double expm1(double num)
Parameters: This method accepts one parameter num of double type and refers to the value on which the exponential operation is to be performed.
Return Value: The method will return the result of enum – 1 operation.
Examples :
Input: num = (1.0/0.0) Output: Infinity Input: 32.2 Output: 9.644557735961714E13
Below programs illustrate the java.lang.StrictMath.expm1() method:
Program 1:
java
// Java program to illustrate the// java.lang.StrictMath.expm1()import java.lang.*;public class Geeks {public static void main(String[] args) { double num1 = 0.0, num2 = -(1.0/0.0); double num3 = (1.0/0.0), num4 = 32.2; /*It returns e^num - 1 */ double eValue = StrictMath.expm1(num1); System.out.println("The expm1 Value of "+ num1+" = "+eValue); eValue = StrictMath.expm1(num2); System.out.println("The expm1 Value of "+ num2+" = "+eValue); eValue = StrictMath.expm1(num3); System.out.println("The expm1 Value of "+ num3+" = "+eValue); eValue = StrictMath.expm1(num4); System.out.println("The expm1 Value of "+ num4+" = "+eValue);}} |
Program 2:
java
// Java program to illustrate the// java.lang.StrictMath.expm1()import java.lang.*;public class Geeks {public static void main(String[] args) { double num1 = 2.0 , num2 = -51.8; double num3 = 61.0, num4 = -32.2; /*It returns e^num - 1 */ double eValue = StrictMath.expm1(num1); System.out.println("The expm1 Value of "+ num1+" = "+eValue); eValue = StrictMath.expm1(num2); System.out.println("The expm1 Value of "+ num2+" = "+eValue); eValue = StrictMath.expm1(num3); System.out.println("The expm1 Value of "+ num3+" = "+eValue); eValue = StrictMath.expm1(num4); System.out.println("The expm1 Value of "+ num4+" = "+eValue);}} |
