// Java program to demonstrate the
// Use of Math Class
public class MathLibraryExample {
    public static void main(String[] args) {
        int i = 7;
        int j = -9;
        double x = 72.3;
        double y = 0.34;

        System.out.println("i is " + i);
        System.out.println("j is " + j);

        // The absolute value of a number is equal to the
        // number if the number is positive or zero and
        // equal to the negative of the number if the number
        // is negative.

        System.out.println("|" + i + "| is " + Math.abs(i));
        System.out.println("|" + j + "| is " + Math.abs(j));

        // Truncating and Rounding functions
        // You can round off a floating point number to the
        // nearest integer with round()
        System.out.println(x + " is approximately " + Math.round(x));
        System.out.println(y + " is approximately " + Math.round(y));

        // The "ceiling" of a number is the smallest integer
        // greater than or equal to the number. Every
        // integer is its own ceiling.
        System.out.println("The ceiling of " + x + " is " + Math.ceil(x));
        System.out.println("The ceiling of " + y + " is " + Math.ceil(y));

        // The "floor" of a number is the largest integer
        // less than or equal to the number. Every integer
        // is its own floor.
        System.out.println("The floor of " + x + " is " + Math.floor(x));
        System.out.println("The floor of " + y + " is " + Math.floor(y));

        // Comparison operators

        // min() returns the smaller of the two arguments
        // you pass it
        System.out.println("min(" + i + "," + j + ") is " + Math.min(i, j));
        System.out.println("min(" + x + "," + y + ") is " + Math.min(x, y));

        // There's a corresponding max() method
        // that returns the larger of two numbers
        System.out.println("max(" + i + "," + j + ") is " + Math.max(i, j));
        System.out.println("max(" + x + "," + y + ") is " + Math.max(x, y));

        // The Math library defines a couple of useful
        // constants:
        System.out.println("Pi is " + Math.PI);
        System.out.println("e is " + Math.E);

        // Trigonometric methods. All arguments are given in
        // radians
        // Convert a 45 degree angle to radians
        double angle = 45.0 * 2.0 * Math.PI / 360.0;
        System.out.println("cos(" + angle + ") is " + Math.cos(angle));
        System.out.println("sin(" + angle + ") is " + Math.sin(angle));

        // Inverse Trigonometric methods. All values are
        // returned as radians
        double value = 0.707;
        System.out.println("acos(" + value + ") is " + Math.acos(value));
        System.out.println("asin(" + value + ") is " + Math.asin(value));
        System.out.println("atan(" + value + ") is " + Math.atan(value));

        // Exponential and Logarithmic Methods
        // exp(a) returns e (2.71828...) raised
        // to the power of a.
        System.out.println("exp(1.0) is " + Math.exp(1.0));
        System.out.println("exp(10.0) is " + Math.exp(10.0));
        System.out.println("exp(0.0) is " + Math.exp(0.0));

        // log(a) returns the natural
        // logarithm (base e) of a.
        System.out.println("log(1.0) is " + Math.log(1.0));
        System.out.println("log(10.0) is " + Math.log(10.0));
        System.out.println("log(Math.E) is " + Math.log(Math.E));

        // pow(x, y) returns x raised to the power of y.
        System.out.println("pow(2.0, 2.0) is " + Math.pow(2.0, 2.0));
        System.out.println("pow(10.0, 3.5) is " + Math.pow(10.0, 3.5));
        System.out.println("pow(8, -1) is " + Math.pow(8, -1));

        // sqrt(x) returns the square root of x.
        for (i = 0; i < 10; i++) {
            System.out.println("The square root of " + i + " is " + Math.sqrt(i));
        }

        // Finally there's one Random method
        // that returns a pseudo-random number
        // between 0.0 and 1.0;
        System.out.println("Here's one random number: " + Math.random());
        System.out.println("Here's another random number: " + Math.random());
    }
}