0o154

0o154 is a numeric literal that uses the 0o prefix to indicate an octal (base-8) value. In octal notation, the digits 1, 5, and 4 are valid, since octal digits range from 0 to 7.

The octal number 0o154 translates to decimal as 108. This is calculated as 1×8^2 + 5×8 + 4 = 64 + 40 + 4 = 108. In ASCII, the decimal value 108 corresponds to the lowercase letter 'l'. The connection to ASCII is incidental and depends on context, but it illustrates how octal values map to common character data in some uses.

Usage and language context:

In many modern programming languages, the 0o prefix designates an octal literal. For example, in Python 3, 0o154 represents the integer 108. Python 2 used an older syntax for octal literals (leading zero without a prefix), such as 0154, which is not valid in Python 3. JavaScript (ECMAScript 2015 and later) also supports 0o-prefixed octal literals, so 0o154 evaluates to 108. Other languages, including Rust, also support 0o-prefixed octal literals, though exact rules and edge cases can vary by language and version.

Notes:

0o154 is not a special constant beyond its interpretation as an octal literal. When reading code, its meaning depends on the language’s numeric literal rules and the surrounding context.