JSON Numbers: Float, Scientific Notation and Precision
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 . --- Valid JSON Number Formats JSON supports four number formats. Integers: Decimals (floats): Scientific notation: Both lowercase and uppercase are valid in scientific notation. The exponent can be positive or negative. Zero and fractions starting with zero: is valid. is valid — a…
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