Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Log functions in Java
The log functions in Java are part of java.lang.Math. The functions include log, log10, log1p. Let us see an example of each of these log functions −
static double log(double a)
The java.lang.Math.log(double a) returns the natural logarithm (base e) of a double value. Let us see an example −
Example
import java.io.*;
public class Main {
public static void main(String args[]) {
// get two double numbers
double x = 60984.1;
double y = -497.99;
// get the natural logarithm for x
System.out.println("Math.log(" + x + ")=" + Math.log(x));
// get the natural logarithm for y
System.out.println("Math.log(" + y + ")=" + Math.log(y));
}
}Output
Math.log(60984.1)=11.018368453441132 Math.log(-497.99)=NaN
static double log10(double a)
The java.lang.Math.log10(double a) returns the base 10 logarithm of a double value. Let us now see an example −
Example
import java.io.*;
public class Main {
public static void main(String args[]) {
// get two double numbers
double x = 60984.1;
double y = 1000;
// get the base 10 logarithm for x
System.out.println("Math.log10(" + x + ")=" + Math.log10(x));
// get the base 10 logarithm for y
System.out.println("Math.log10(" + y + ")=" + Math.log10(y));
}
}Output
Math.log10(60984.1)=4.78521661890635 Math.log10(1000.0)=3.0
static double log1p(double x)
The java.lang.Math.log1p(double x) returns the natural logarithm of the sum of the argument and 1.
Example
import java.io.*;
public class Main {
public static void main(String args[]) {
// get two double numbers
double x = 60984.1;
double y = 1000;
// call log1p and print the result
System.out.println("Math.log1p(" + x + ")=" + Math.log1p(x));
// call log1p and print the result
System.out.println("Math.log1p(" + y + ")=" + Math.log1p(y));
}
}Output
Math.log1p(60984.1)=11.018384851023473 Math.log1p(1000.0)=6.90875477931522
Updated on: 23-Sep-2019
266 Views
Advertisements