{"id":395,"date":"2011-12-20T15:17:22","date_gmt":"2011-12-20T15:17:22","guid":{"rendered":"http:\/\/javascript-tutor.net\/index.php\/"},"modified":"2017-11-16T23:10:01","modified_gmt":"2017-11-16T23:10:01","slug":"lesson-25-generating-random-values-array","status":"publish","type":"page","link":"https:\/\/javascript-tutor.net\/index.php\/lesson-25-generating-random-values-array\/","title":{"rendered":"JavaScript Lesson 25: Generating Random Values"},"content":{"rendered":"

<Lesson 24><\/a> [Contents]<\/a> <Lesson 26><\/a><\/strong><\/h4>\n

25.1: Generating random numbers of an array in JavaScript<\/strong><\/h3>\n

We have learned about a random generation of numbers in Javascript Lesson 14. However, in this lesson, you will learn how to generate random numbers using an array. Since every element in an array is identified by a subscript, hence by randomizing the subscripts we will be able to generate random elements of the array.<\/p>\n

The randomizing process can be carried using the\u00a0random<\/strong> method of the\u00a0Math<\/strong> object.\u00a0Math.random( )<\/strong> generates numbers between 0 and 1. Therefore, to obtain random numbers between 0 and 6, we need to multiply Math.random( ) with 6, i.e Math.random( )*6. However, to obtain random integers between 0 and 6, we need to use the floor method of the Math object. The floor(x)<\/strong> method returns the greatest integer less than or equal to x. For example, Math.floor(5.4)=5<\/p>\n