---
title: "Syntax Error — AP Comp Sci A Definition & Examples"
description: "A syntax error breaks Java's grammar rules so the compiler rejects your code before it runs. Learn how it differs from runtime and logic errors on AP CSA."
canonical: "https://fiveable.me/ap-comp-sci-a/key-terms/syntax-error"
type: "key-term"
subject: "AP Computer Science A"
---

# Syntax Error — AP Comp Sci A Definition & Examples

## Definition

A syntax error is a mistake in the structure or format of a program's code that prevents it from being compiled or executed properly. It occurs when the code violates the rules and grammar of the programming language.

## Related Study Guides

- [1.1 Why Programming? Why Java?](/ap-comp-sci-a/unit-1/why-programming-why-java/study-guide/lVK6rmrBuug17i1Hna9z)

## Review

### Related Terms

- Logic Error: A logic error refers to a mistake in the algorithm or flow of a program that causes incorrect output or unexpected behavior.
- Runtime Error: A runtime error occurs during program execution when something unexpected happens, such as dividing by zero or accessing an invalid memory location.
- Compiler: A compiler is a software tool that translates human-readable source code into machine-executable instructions. It checks for syntax errors and generates an executable file if there are no errors.