{"id":256,"date":"2018-04-30T17:17:41","date_gmt":"2018-04-30T17:17:41","guid":{"rendered":"https:\/\/restfulapi.net\/?p=256"},"modified":"2021-09-27T23:10:39","modified_gmt":"2021-09-27T17:40:39","slug":"json-data-types","status":"publish","type":"post","link":"https:\/\/restfulapi.net\/json-data-types\/","title":{"rendered":"JSON Data Types"},"content":{"rendered":"\n<p>At the granular level, JSON consists of 6 data types. <\/p>\n\n\n\n<p>The first four data types (string, number, boolean and null) can be referred to as <strong>simple data types<\/strong>. The other two data types (object and array) can be referred to as <strong>complex data types<\/strong>.<\/p>\n\n\n\n<ol><li>string<\/li><li>number<\/li><li>boolean<\/li><li>null\/empty<\/li><li>object<\/li><li>array<\/li><\/ol>\n\n\n\n<p>Let&#8217;s learn about each data type one by one.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. String<\/h3>\n\n\n\n<p>A string is a sequence of zero or more Unicode characters, enclosed between <code>\"<\/code> and <code>\"<\/code> (double quotes). Strings wrapped in single quotes <code>'<\/code> are not valid.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json\">{\r\n    \"color\" : \"Purple\"\r\n}<\/code><\/pre>\n\n\n\n<p>JSON Strings can contain the following backslash-escaped characters:<\/p>\n\n\n\n<ul><li><code>\\\"<\/code> &#8211; Double quote<\/li><li><code>\\\\<\/code> &#8211; Backslash<\/li><li><code>\\\/<\/code> &#8211; Forward slash<\/li><li><code>\\b<\/code> &#8211; Backspace<\/li><li><code>\\f<\/code> &#8211; Form feed<\/li><li><code>\\n<\/code> &#8211; Newline<\/li><li><code>\\r<\/code> &#8211; Carriage return<\/li><li><code>\\t<\/code> &#8211; Tab<\/li><li><code>\\u<\/code> &#8211; Trailed by four hex digits<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Number<\/h3>\n\n\n\n<p>JSON numbers follow JavaScript\u2019s double-precision floating-point format.<\/p>\n\n\n\n<ol><li>Represented in <code>base 10<\/code> with no superfluous leading zeros (e.g. 67, 1, 100).<\/li><li>Include digits between 0 and 9.<\/li><li>Can be a negative number (e.g. <code>-10<\/code>.<\/li><li>Can be a fraction (e.g. <code>.5<\/code>).<\/li><li>Can also have an exponent of 10, prefixed by <code>e<\/code> or <code>E<\/code> with a plus or minus sign to indicate positive or negative exponentiation.<\/li><li>Octal and hexadecimal formats are not supported.<\/li><li>Can not have a value of NaN (Not A Number) or Infinity.<\/li><\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json\">{\r\n\t\"number_1\" : 210,\r\n\t\"number_2\" : -210,\r\n\t\"number_3\" : 21.05,\r\n\t\"number_4\" : 1.0E+2\r\n}\r\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. Boolean<\/h3>\n\n\n\n<p>Booleans values can be either <code>true<\/code> or <code>false<\/code>. Boolean values are not surrounded by quotes and will be treated as string values.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">{\r\n\t\"visibility\" : true\r\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4. null<\/h3>\n\n\n\n<p>Although technically not a value Type, <code>null<\/code> is a special value in JSON. When there is no value to assign to a key, it can be treated as <code>null<\/code>.<\/p>\n\n\n\n<p><code>null<\/code> value should not be surrounded by quotes.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json\">{\r\n\t\"visibility\" : true,\r\n\t\"popularity\" : null, \/\/empty\r\n\t\"id\" : 210\r\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">5. Object<\/h3>\n\n\n\n<ol><li>An <em>unordered<\/em> set of name\/value pairs inserted between {} (curly braces).<\/li><li>An object can contain zero or more name\/value pairs.<\/li><li>Multiple name\/value pairs are separated by a , (comma).<\/li><\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json\">{\r\n\t\"visibility\" : true,\r\n\t\"popularity\" : \"immense\",\r\n\t\"id\" : 210\r\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">6. Array<\/h3>\n\n\n\n<ol><li>An <em>ordered<\/em> collection of values.<\/li><li>Begins with <code>[<\/code> (left bracket) and ends with <code>]<\/code> (right bracket).<\/li><li>It&#8217;s values are separated by <code>,<\/code> (comma).<\/li><\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json\">{\r\n\t\"ids\" : [\"1\",\"2\",\"3\"]\r\n}\r\n\r\n\/\/or\r\n\r\n{\r\n\"ids\" : [\r\n\t\t{\"id\" : 1},\r\n\t\t{\"id\" : 2},\r\n\t\t{\"id\" : 3}\r\n\t]\r\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>At the granular level, JSON consists of 6 data types. The first four data types (string, number, boolean and null) can be referred to as simple data types. The other two data types (object and array) can be referred to as complex data types. string number boolean null\/empty object array Let&#8217;s learn about each data &#8230; <a title=\"JSON Data Types\" class=\"read-more\" href=\"https:\/\/restfulapi.net\/json-data-types\/\" aria-label=\"More on JSON Data Types\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":249,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[17],"_links":{"self":[{"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/posts\/256"}],"collection":[{"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/comments?post=256"}],"version-history":[{"count":0,"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/posts\/256\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/media\/249"}],"wp:attachment":[{"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/media?parent=256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/categories?post=256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/restfulapi.net\/wp-json\/wp\/v2\/tags?post=256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}