Allowedzero
Allowedzero is a term used in data validation and input parsing to describe whether a numeric value represented as text is permitted to start with a zero. It is commonly encountered in form validators, data import pipelines, and fixed-width identifiers where leading zeros carry semantic meaning.
When allowedzero is true, strings such as 0123 or 0001 are accepted as valid numeric representations. When
In regular expressions, allowedzero can be implemented with different patterns. With allowedzero enabled: ^\d+$. With allowedzero
Practical considerations include how leading zeros affect storage, sorting, and interpretation. Codes stored as strings can
See also: leading zeros, numeric validation, fixed-width fields, string data type.