{"id":7533,"date":"2022-12-15T14:55:14","date_gmt":"2022-12-15T09:25:14","guid":{"rendered":"https:\/\/innovationm.co\/?p=7533"},"modified":"2022-12-15T14:55:14","modified_gmt":"2022-12-15T09:25:14","slug":"javascript-arrays","status":"publish","type":"post","link":"https:\/\/www.innovationm.com\/blog\/javascript-arrays\/","title":{"rendered":"JavaScript Arrays"},"content":{"rendered":"

An array is a linear data structure and collection of items stored at a contiguous memory
\nlocation. Pairs of square brackets [ ] represent an array and all elements are comma (,)
\nseparated.<\/p>\n

An Array can hold multiple values(elements) of any type i.e (String, Number, Boolean, objects,
\nand even other Arrays ) under a single name.
\nArrays are zero-based indexing. The position of the element is called the index.<\/p>\n

In below example array contains four elements of type String, Number, Boolean, and Object
\neg. const array = [ “abc” , 123, true, {} ]; \/\/ this is how we can create array using an
\narray literal
\n-> Another way to create an array is using Array Constructor.
\neg. const array = new Array(“abc” , 123, true, {} );
\nconsole.log( array[0] ); \/\/ output will be `abc` or we can say the first element at 0th
\nthe index will be printed.<\/p>\n

2. Arrays in javaScript are mutable and can be changed freely<\/p>\n

eg. const outArray = [50, 40, 60 ] ;\r\noutArray [0] = 15 ; \/\/ changing first element to ' 15 '\r\nnow outArray value is [ 15, 40, 60]<\/pre>\n
3. Nested Array (Multi-dimensional array)
\nArray or arrays inside Array. Or we can say that A multi-dimensional Array is an array
\ncontaining one or more arrays.
\neg. const teams = [ [ “Delhi”,225] ,[“Punjab”,350] ];
\nIn the above example, we have one array “teams” and inside the “teams ” array we have two
\nmore arrays<\/p>\n
1<\/p>\n
-> at 0th index i.e [ \"Delhi\",225]\r\n-> at 1st index i.e [\"Punjab\",350]\r\n\r\nAccess multi-dimensional array:-\r\nconst m_Array = [\r\n\r\n[ 1, 2, 3], \/\/ ( 0th index of m_Array)\r\n[ 4, 5, 6], \/\/ ( 1st index of m_Array )\r\n[7, 8,9], \/\/ ( 2nd index of m_Array)\r\n[ [ 10, 11, 12], 13, 14] \/\/ ( 3rd index of m_Array)\r\n\r\n];\r\nOUTPUTS:- let's iterate m_Array\r\nconsole.log( m_Array [3] ); \/\/ output will be [ [10, 11, 12], 13, 14 ]\r\nconsole.log( m_Array[3][0] ); \/\/ output will be [10, 11, 12 ]\r\nconsole.log(m_Array[3][0][1] ) ; \/\/ output will be 11<\/pre>\n
When we use [ ] to access an array, the first set of brackets refers to the parent array (the first level
\nor in the outermost array ) and each additional bracket refers to the next level of entries inside.<\/p>\n","protected":false},"excerpt":{"rendered":"
An array is a linear data structure and collection of items stored at a contiguous memory location. Pairs of square brackets [ ] represent an array and all elements are comma (,) separated. An Array can hold multiple values(elements) of any type i.e (String, Number, Boolean, objects, and even other Arrays ) under a single […]<\/p>\n","protected":false},"author":1,"featured_media":7534,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[256,360],"tags":[819,722,224,346],"class_list":["post-7533","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java-application","category-javascript","tag-array","tag-blog","tag-java","tag-javascript"],"yoast_head":"\nJavaScript Arrays - InnovationM - Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.innovationm.com\/blog\/javascript-arrays\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript Arrays - InnovationM - Blog\" \/>\n<meta property=\"og:description\" content=\"An array is a linear data structure and collection of items stored at a contiguous memory location. 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