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---
language: json
filename: learnjson.json
contributors:
- ["Anna Harren", "https://github.com/iirelu"]
- ["Marco Scannadinari", "https://github.com/marcoms"]
- ["himanshu", "https://github.com/himanshu81494"]
---
As JSON is an extremely simple data-interchange format, this is most likely going
to be the simplest Learn X in Y Minutes ever.
JSON in its purest form has no actual comments, but most parsers will accept
C-style (`//`, `/* */`) comments. For the purposes of this, however, everything is
going to be 100% valid JSON. Luckily, it kind of speaks for itself.
Data types supported by JSON includes: numbers, string, boolean, array, object and null.
Supporting browsers are: Firefox(Mozilla) 3.5, Internet Explorer 8, Chrome, Opera 10, Safari 4.
JSON file type for JSON files is ".json". The MIME type for JSON text is "application/json"
Drawbacks of JSON include lack of type definition and some sort of DTD.
```json
{
"key": "value",
"keys": "must always be enclosed in double quotes",
"numbers": 0,
"strings": "Hellø, wørld. All unicode is allowed, along with \"escaping\".",
"has bools?": true,
"nothingness": null,
"big number": 1.2e+100,
"objects": {
"comment": "Most of your structure will come from objects.",
"array": [0, 1, 2, 3, "Arrays can have anything in them.", 5],
"another object": {
"comment": "These things can be nested, very useful."
}
},
"silliness": [
{
"sources of potassium": ["bananas"]
},
[
[1, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, 1, "neo"],
[0, 0, 0, 1]
]
],
"alternative style": {
"comment": "check this out!"
, "comma position": "doesn't matter - as long as it's before the value, then it's valid"
, "another comment": "how nice"
},
"that was short": "And, you're done. You now know everything JSON has to offer."
}
```
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