ISO/IEC
21778 - Information technology — The JSON
data interchange syntax
8 Numbers
A number is a sequence of decimal digits with no superfluous leading zero. It may have a preceding
minus sign (U+002D). It may have a fractional part prefixed by a decimal point (U+002E). It may have
an exponent, prefixed by e (U+0065) or E (U+0045) and optionally + (U+002B) or – (U+002D). The
digits are the code points U+0030 through U+0039.
Yes, it is:
https://www.iso.org/standard/71616.html
Page 3 of INTERNATIONAL STANDARD