requiredargument
A required argument, in programming, is a parameter that must be supplied by the caller when invoking a function or method. If a required argument is not provided, the call is typically considered invalid and will result in an error or exception.
Required arguments are contrasted with optional or defaulted arguments. An optional argument has a default value,
Enforcement of required arguments varies by language. In statically typed languages, missing required arguments often produces
Examples across common languages illustrate the concept. In Python, a function defined as def f(a, b): pass
Best practices include documenting which arguments are required, validating inputs early, and providing clear error messages