A binary integer is ‘0b’ or ‘0B’ followed by zero or more of the binary digits ‘01’.
An octal integer is ‘0’ followed by zero or more of the octal digits (‘01234567’).
A decimal integer starts with a non-zero digit followed by zero or more digits (‘0123456789’).
A hexadecimal integer is ‘0x’ or ‘0X’ followed by one or more hexadecimal digits chosen from ‘0123456789abcdefABCDEF’.
Integers have the usual values. To denote a negative integer, use the prefix operator ‘-’ discussed under expressions (see Prefix Operators).