Answer

• Decimal integer literals – An integer literal consisting of a sequence of digits is taken to be decimal integer literal unless it begins with 0 (digit zero).
  Example – 1234, 41, +97
• Octal integer literals – A sequence of digits starting with 0o (digit zero followed by letter o) is taken to be an octal integer.
  Example – decimal integer 8 will be written as 0o110 as octal integer. (8₁₀=10₈)
• Hexadecimal integer literals – A sequence of digits preceded by 0x or 0X is taken to be an hexadecimal integer.
  Example – 12 (decimal integer) will be written as 0o14 (as octal) and 0xC (as hexadecimal).