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# Using Math Constants

In this example we shall show you how to get constant numbers using the Math Class. Apart from the methods for performing basic numeric operations such as square root, and trigonometric functions, the Math Class also has methods for getting the e, that is the base of the natural logarithms and the PI, that is the ratio of the circumference of a circle to its diameter. To get constant numbers using the Math Class one should perform the following steps:

• Use Math.E to get the double value that is closer than any other to e, the base of the natural logarithms.
• Use Math.PI to get the double value that is closer than any other to pi, the ratio of the circumference of a circle to its diameter,

as described in the code snippet below.

package com.javacodegeeks.snippets.core;

import java.lang.Math;

public class MathConstants {

public static void main(String args[]) {
System.out.println("Pi = " + Math.PI);
System.out.println("E = " + Math.E);
}

}

Output :

Pi = 3.141592653589793
E = 2.718281828459045

This was an example of how to get constant numbers using the Math Class in Java.