JSON Numbers: Integer, Float, Scientific Notation, and Precision Limits
JSON numbers: integers, floats, scientific notation, and precision limits. What happens when numbers exceed IEEE 754 double precision boundaries.
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Tags: json, developer-tools, beginner
JSON Numbers: Integer, Float, Scientific Notation, and Precision Limits Numbers seem like the simplest part of JSON. They're just numbers. But JSON's number rules are stricter than most developers expect, and there is a precision issue with large integers that can silently corrupt data in ways that are hard to debug. This guide covers every valid number format, every invalid format that looks like it should work, and the precision gotcha that affects JavaScript, browsers, and anything that uses JavaScript's . Invalid Number Formats These are the formats that developers commonly try and that JSON always rejects. Every one of these will cause a parse error. Let's go through each: Hex literals (): The after the leading zero is unexpected. JSON has no hex notation. Convert to decimal: . Octal…
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