Special Numeric Formats

Hexadecimal, octal, binary, and scientific numeric literals.

Besides ordinary decimal, a number may be written in hexadecimal, octal, binary, or scientific notation. These are just different ways of writing the same numeric value — the parser reads them all into one number.

Notation

Prefix / form

Example

Value

Decimal

(none)

255

255

Hexadecimal

0x

0xFF

255

Octal

0o

0o377

255

Binary

0b

0b11111111

255

Scientific

e exponent

2.55e2

255

dec: number, hex: number, oct: number, bin: number, sci: number
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255, 0xFF, 0o377, 0b11111111, 2.55e2

All five fields above hold the value 255.

Notes

A leading sign is allowed: -0x1A, +1.5e3.
Notation is independent of the field's type — any number type accepts any notation as input.
How a number is written back on serialization is controlled by the schema's format option (decimal, hex, octal, binary, scientific); see Numeric Types.
For very large integers use BigInt (123n); for exact decimals use Decimal (1.50m).