Type insecurity refers to a situation in programming languages where variables can hold values of different types during different stages of a program's execution.This lack of strict typing can lead to various issues and potential problems in the code.
For example, in Pascal, there is a version of identifier declarations where type checking is performed at the syntax level.This can result in type insecurity because the compiler may not catch potential type mismatches or inconsistencies, leading to runtime errors or unexpected behavior.
Type insecurity is considered bad because it can lead to unpredictable and unreliable code. In a program with type insecurity, it becomes difficult to ensure that data is used and manipulated in a consistent and safe manner.