What Is Type Checking?

Type checking is a process used in computer programming to ensure that the data types of variables are correct. It involves verifying and enforcing the constraints on data types within a program, such as ensuring that an integer is not assigned to a variable meant for strings or vice versa. Type checking helps prevent errors from occurring during runtime by catching any type mismatches before they can cause problems.

Type checking can be done either statically or dynamically. Static type checking occurs at compile time, when the compiler checks each statement against its predefined set of rules and verifies whether it meets all requirements for valid code. Dynamic type checking happens at run-time, where values are checked while the program is running to make sure they match up with their expected types. Both methods have advantages and disadvantages depending on what kind of application you’re developing; however, static type checking tends to be more reliable since it catches errors earlier in development rather than later on after deployment has already occurred.

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