Which of the following describes a problem with source code?

A syntax error occurs when the source code is written with incorrect syntax that violates the rules of the programming language. This type of error is often identified before the program is executed, during the compilation or interpretation phase. Syntax rules govern the structure of the code, such as the correct use of punctuation, keywords, and formatting. When the code does not adhere to these rules, the compiler or interpreter will generate an error message, indicating that it cannot parse the code.

For instance, forgetting to close a parenthesis, misspelling a keyword, or using the wrong data type are all examples of syntax errors. These mistakes prevent the program from compiling or running properly, which must be corrected before further development can proceed.

Understanding syntax errors is crucial for programmers because they are often the first barrier to executing a program. Recognizing and fixing these errors leads to smoother development and debugging processes, making it a foundational concept in programming.