# Mathematical Functions in Java

The java.lang.Math class contains methods for performing basic numeric operations such as the elementary exponential, logarithm, square root, and trigonometric functions. This class provides mathematical functions in Java.

Let us see some of these functions −

Sr.NoMethod & Description
1static double abs(double a)
This method returns the absolute value of a double value.
2static float abs(float a)
This method returns the absolute value of a float value.
3static int abs(int a)
This method returns the absolute value of an int value.
4static long abs(long a)
This method returns the absolute value of a long value.
5static double acos(double a)
This method returns the arc cosine of a value; the returned angle is in the range 0.0 through pi.
6static double asin(double a)
This method returns the arc sine of a value; the returned angle is in the range -pi/2 through pi/2.
7static double atan(double a)
This method returns the arc tangent of a value; the returned angle is in the range -pi/2 through pi/2.
8static double atan2(double y, double x)
This method returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r, theta).
9static double cbrt(double a)
This method returns the cube root of a double value.
10static double ceil(double a)
This method returns the smallest (closest to negative infinity) double value that is greater than or equal to the argument and is equal to a mathematical integer.

Let us now see an example to return the absolute value of a long value using the abs(long a) function in Java. Here, a is the argument whose absolute value is to be determined −

## Example

import java.util.*;
public class Demo {
public static void main( String args[] ) {
// get some longs to find their absolute values
long x = 76487687634l;
long y = -1876487618764l;
// get and print their absolute values
System.out.println("Math.abs(" + x + ")=" + Math.abs(x));
System.out.println("Math.abs(" + y + ")=" + Math.abs(y));
System.out.println("Math.abs(-18885785959l)=" + Math.abs(-18885785959l));
}
}

## Output

Math.abs(76487687634)=76487687634
Math.abs(-1876487618764)=1876487618764
Math.abs(-18885785959l)=18885785959

## Example

Let us see another example wherein we are returning the hyperbolic sine of a double value −

import java.util.*;
public class Demo {
public static void main( String args[] ) {
// get two double numbers numbers
double x = 45;
double y = -180;
}
sinh(0.7853981633974483)=0.8686709614860095
sinh(-3.141592653589793)=-11.548739357257748