12345abc

12345abc is an eight-character alphanumeric string that is commonly used in documentation and tutorials to illustrate the format of identifiers and tokens. The sequence combines digits (1 through 5) and lowercase letters (a, b, c), presenting a simple example that lies within the hexadecimal character set used in computing.

Origin and scope: 12345abc is not tied to a real product, project, or standard. It is a synthetic example chosen for readability and to demonstrate how alphanumeric values behave in code, databases, and configuration files. Its primary role is illustrative rather than representational.

Format and interpretation: Although eight characters long, the string is not guaranteed to carry any semantic meaning. In examples, it may stand in for a hash prefix, a partial key, a serial number, or a session-like token. It is typically treated as a string value rather than a purely numeric quantity.

Applications and usage: You may encounter 12345abc in API request samples, fixture data for unit tests, or validation schemas that require a fixed-length alphanumeric identifier. Such examples help illustrate parsing, length checks, and case handling in software systems.

Security and best practices: Because sequences like 12345abc are short and easily guessed, they should not be used for secrets or authentication tokens in production. For secure applications, use cryptographically random tokens with sufficient length and entropy, and implement proper storage, transmission, and rotation policies.

See also: hexadecimal, token, identifier, fixture data.