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Categories of Errors

Explore the main categories of errors in JavaScript programming. Understand syntax errors that stop code execution, logical errors that cause incorrect results, and exceptions that occur during runtime. This lesson helps you identify and resolve common coding mistakes for cleaner, more reliable JavaScript programs.

Errors in programming

Errors are problems or faults that occur in the program and cause unexpected behavior. Some errors don’t allow the program to begin execution, some can interrupt the execution, and others can be detected only after analyzing the program’s output. Errors are a way through which our machines tell us that they do not understand what we want them to do. For example, if people do not follow the rules and words of our language, we may not understand what they want to say or want us to do. Let’s explore the various types of programming errors and how they occur.

Syntax errors

Syntax errors are the most basic type of errors. They arise when JavaScript is unable to understand a line of ...