JSON Basics

What are JSON data types?

JSON supports six fundamental data types: strings, numbers, booleans, null, objects, and arrays. Strings are sequences of characters enclosed in double quotes. Numbers can be integers or floating-point values without quotes. Booleans represent true or false values. Null represents an empty or non-existent value. Objects are collections of key-value pairs enclosed in curly braces, allowing nested structures. Arrays are ordered lists of values enclosed in square brackets, which can contain any JSON data type including other arrays or objects. Unlike some programming languages, JSON does not have separate types for integers, floats, dates, or undefined values. This simplicity makes JSON universally compatible across different platforms.
Last updated: December 23, 2025

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