Undefined Explained

Undefined may refer to:

Mathematics

Undefined (mathematics), with several related meanings
- Indeterminate form, in calculus

Computing

Undefined behavior, computer code whose behavior is not specified under certain conditions
Undefined value, a condition where an expression does not have a correct value
- Undefined variable Undefined, a function or variable lacking a declaration
Undefined, a variable lacking initialization
Undefined, an unavailable linker symbol (function, or global variable)

Other uses

Undefined, something that lacks any definition
Undefined citizenship, a post-Soviet form of statelessness in Estonia

See also