👉 In programming and computer science, an unreferenced variable refers to a variable that is not declared or assigned a value. This can happen in several situations:
1.
Undefined Variable
: A variable that has been left unassigned or undeclared by the programmer. It does not have a specific name or type.
2.
Variable Not Defined
: Variables which are used but do not exist or are not assigned a value. They may be declared as variables, but never initialized.
3.
Un
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