0o12

0o12 is a representation of an octal number, using the prefix 0o to indicate base 8. The digits 1 and 2 form the octal value.

In decimal terms, 0o12 equals 1×8 + 2 = 10. Its binary representation is 1010, and in hexadecimal it is 0xA.

Usage and context: many programming languages use the 0o prefix to denote octal literals, including Python 3 and modern JavaScript (ES6 and later). For example, in Python, the expression 0o12 evaluates to 10; in JavaScript, 0o12 similarly evaluates to 10. The 0o prefix helps distinguish octal values from decimal or hexadecimal notation, addressing issues that older leading-zero octal forms could cause.

Notes on representation: the valid digits in octal are 0 through 7, so 0o12 is a valid octal literal, whereas 0o8 or 0o9 would be invalid. Octal notation is sometimes encountered in contexts involving low-level data, permissions, or bitmask calculations, where octal’s grouping of bits can be convenient.

Summary: 0o12 is an octal literal whose value is 10 in decimal, commonly used in several programming languages to express octal numbers in a clear and unambiguous way.