JSON Data Types: null, true/false, Numbers, and Strings Explained
JSON data types explained: null, true, false, numbers, and strings. Covers type coercion risks, null handling, and language-specific parsing differences.
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Tags: json, developer-tools, beginner
JSON Data Types: null, true/false, Numbers, and Strings Explained JSON supports exactly six value types. You can build any data structure you like from combinations of these six. But each type has its own rules, and several of them have gotchas that catch beginners off guard. This guide walks through each type with examples of valid and invalid usage, and explains what actually happens when you get the type wrong. Numbers JSON numbers are written as bare values, without quotes. All of those are valid. JSON supports integers, negative numbers, decimals, and scientific notation. Several number formats that developers sometimes try are not valid JSON: Hex literals (), octal notation (), a leading plus sign (), , and — none of these are valid JSON. Any parser will reject this document with a…
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