Type Checking
Type checking is a programming concept that involves verifying and enforcing the data types of variables, expressions, and functions in code to ensure they are used correctly. It can be performed statically at compile-time or dynamically at runtime, helping catch type-related errors early in development. This process enhances code reliability, maintainability, and developer productivity by preventing mismatches like adding a string to a number.
Developers should learn and use type checking to reduce bugs, improve code quality, and facilitate collaboration in large or complex projects, especially in languages like TypeScript, Python with type hints, or Java. It is crucial for building robust applications where type safety prevents runtime errors, such as in financial systems or web services, and it aids in code documentation and tooling support like autocompletion in IDEs.