What are syntax errors?

Syntax errors are one of the fundamental types of errors in programming. They occur when the rules of the programming language are not followed correctly in the source code. In other words, syntax errors result from violations of the language's grammatical rules or structure. These errors prevent the code from being parsed or compiled, and as a result, the program cannot run until they are fixed. 

Here are some common examples of syntax errors:

Misspelled Keywords: Using incorrect spellings for language keywords or reserved words. For example, using "mian" instead of "main" in Java.

Missing or Mismatched Parentheses, Brackets, or Quotes: Forgetting to close parentheses, brackets, or quotes or using them incorrectly can lead to syntax errors.
System.out.print("Hello, World); // Missing closing quote

Unmatched Braces or Parentheses: Forgetting to close braces or parentheses can lead to syntax errors.
public class MyClass { public static void main(String[] args { System.out.println("Hello, World"); }// Missing closing brace

Missing Semicolons: In some programming languages like C, C++, and Java, semicolons are used to terminate statements. Missing semicolons can result in syntax errors.
public class MyClass { public static void main(String[] args { System.out.println("Hello, World") // Missing semicolon } }

Using Reserved Identifiers: Attempting to use words that are reserved by the programming language as variable names or identifiers.
int = 42; // Using a reserved word as an identifier

Syntax errors are usually caught by the compiler or interpreter during the compilation or parsing phase of program execution. The error messages generated by the compiler or interpreter typically provide information about the location and nature of the syntax error, making it easier for programmers to identify and correct the issue.

Fixing syntax errors is an essential part of the programming process, and once they are resolved, the program can proceed to the next phase of execution, which involves addressing logic errors (bugs in the program's algorithm or logic) and runtime errors (errors that occur during program execution).