Math class methods for finding power, absolute value, min, max and rounding number etc in java

import java.lang.Math;

public class MathDemo {

   public static void main(String[] args) {

   // get some doubles to find their absolute values
   double x = 4876.1874d;
 
   //syntax is static double abs(double a)
   // get and print their absolute values
   System.out.println("Math.abs(" + x + ")=" + Math.abs(x));//abs method returns the absolute value of the argument.
 
    // get a variable x which is equal to PI/2
   double x = Math.PI / 2;

   // convert x to radians
   x = Math.toRadians(x);

   // get the arc cosine of x
   System.out.println("Math.acos(" + x + ")=" + Math.acos(x));

 // get a variable x which is equal to PI/2
   double x = Math.PI / 2;

   // convert x to radians
   x = Math.toRadians(x);

   // get the arc sine of x
   System.out.println("Math.asin(" + x + ")=" + Math.asin(x));



   // get a variable x which is equal to PI/2
   double x = Math.PI / 2;

   // convert x to radians
   x = Math.toRadians(x);

   // get the arc tangent of x
   System.out.println("Math.atan(" + x + ")" + Math.atan(x));

// get two double numbers
   double x = 45.0;
   double y = 180.0;

   // convert them to radians
   x = Math.toRadians(x);
   y = Math.toRadians(y);

   // print their cosine
   System.out.println("Math.cos(" + x + ")=" + Math.cos(x));
   System.out.println("Math.cos(" + y + ")=" + Math.cos(y));

 // get two double numbers
   double x = 5;
   double y = 0.5;

   // print e raised at x and y
   System.out.println("Math.exp(" + x + ")=" + Math.exp(x));
   System.out.println("Math.exp(" + y + ")=" + Math.exp(y));

// get two double numbers
   double x = 60984.1;
   double y = -497.99;

   // call floor and print the result
   System.out.println("Math.floor(" + x + ")=" + Math.floor(x));
   System.out.println("Math.floor(" + y + ")=" + Math.floor(y));
   System.out.println("Math.floor(0)=" + Math.floor(0));


   // 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));


   // get two integer numbers
   int x = 60984;
   int y = 1000;

   // print the larger number between x and y
   System.out.println("Math.max(" + x + "," + y + ")=" + Math.max(x, y));

 // get two random double numbers
   double x = Math.random();
   double y = Math.random();

   // print the numbers and print the higher one
   System.out.println("Random number 1:" + x);
   System.out.println("Random number 2:" + y);
   System.out.println("Highest number:" + Math.max(x, y));
   }
}



2 .program  

/*
 * Program to demonstrate the use of Math class methods
 */

import java.io.*;
public class Mathstest {


public static void main(String[] args)
{
int num1,num2,x,y,z;
double l1,l2,l3;
String str;
BufferedReader bf= new BufferedReader(new InputStreamReader(System.in));
try
{
System.out.println("Enter a number");
str=bf.readLine();
num1=Integer.parseInt(str);
x=Math.abs(num1);
System.out.println("Absolute value of "+num1+" is ="+x);

System.out.println("Enter first number");
str=bf.readLine();
num1=Integer.parseInt(str);
System.out.println("Enter second number");
str=bf.readLine();

num2=Integer.parseInt(str);
y=Math.max(num1, num2);
System.out.println("Largest number is ="+y);
y=Math.min(num1, num2);
System.out.println("Smallest number is ="+y);
System.out.println("Enter a decimal number");
str=bf.readLine();

l1=Float.valueOf(str);
l2=Math.log(l1);
System.out.println("Log of "+l1+" is ="+l2);
System.out.println("Enter a decimal number");
str=bf.readLine();

l1=Float.valueOf(str);
l2=Math.sqrt(l1);
System.out.println("Square root of "+l1+" is ="+l2);
l3=Math.floor(l2);
System.out.println("Floor value of "+Math.sqrt(l1)+" is ="+l3);
l2=Math.ceil(l2);
System.out.println("Ceil value of "+Math.sqrt(l1)+" is ="+l2);
System.out.println("Enter a decimal number");
str=bf.readLine();

l1=Float.valueOf(str);
l2=Math.cbrt(l1);
System.out.println("Cube root of "+l1+" is ="+l2);
System.out.println("Enter a decimal number");
str=bf.readLine();

l1=Float.valueOf(str);
System.out.println("Enter the power to raise ");
str=bf.readLine();

l2=Float.valueOf(str);
l3=Math.pow(l1, l2);
System.out.println(l1+"raised to the power "+l2+ " = "+l3);
}
catch(Exception e){}


}


}