Numeric Literal
Syntax
Number:
( [ 0 ] [ Xx ] [ _0-9a-fA-F ]+)
|( [ 0 ] [ Bb ] [ _0-1 ]+)
|( [ 0 ] [ Oo ] [ _0-7 ]+)
|( [ 0-9 ] [ _0-9 ]* ( \.[ _0-9 ]+ ){0,1} ( [ Ee ] [ \+\- ]{0,1} [ 0-9_ ]* ){0, 1} )
| Literals* | Example | Exponentiation |
|---|---|---|
| Decimal integer | 123_456 | N/A |
| Hex integer | 0xff1 | N/A |
| Octal integer | 0o72 | N/A |
| Binary integer | 0b1111_0100 | N/A |
| Floating point | 12.23e-5 | Optional |
*: All number literals allow _ as a visual separator: 1_234.0E+18
*: All characters are case insensitive.