0o4243

0o4243 is an octal numeral written with the Python-style prefix 0o. It denotes the base-8 representation of a number, not a decimal or hexadecimal literal by itself.

Value: In decimal, 0o4243 equals 2211. This is computed as 4*8^3 + 2*8^2 + 4*8 + 3 = 2048 + 128 + 32 + 3 = 2211. In hexadecimal, it corresponds to 0x8A3.

Usage in programming: In Python (version 3 and later), 0o4243 is an octal literal and evaluates to the integer 2211. The same can be obtained with int('4243', 8). In Python 2, octal literals used a leading zero without the o, such as 04243, which could be confused with decimal numbers; thus Python 3 adopted the 0o prefix to avoid ambiguity.

Context and interpretation: The digits 4, 2, 4, 3 are each in the range 0–7, consistent with octal digits. If interpreted as an Unix file permission mode, a four-digit octal value yields a special-perms digit followed by owner, group, and others digits; 0o4243 would indicate the special permission bit and specific owner/group/other permissions, but such a value is uncommon for standard permissions.

See also: Octal numeral system; Python numeric literals; Hexadecimal and decimal conversions.