Operator Precedence Table
Complete reference for operator precedence across programming languages
Quick lookup tool for operator precedence, associativity rules, and evaluation order across major programming languages. Perfect for developers who need instant reference during coding.
Operator Precedence Table - JavaScript
Higher precedence numbers are evaluated first. Operators with the same precedence follow associativity rules.
| Precedence | Operator | Description | Associativity | Example |
|---|
Expression Evaluator
Test operator precedence with custom expressions
Evaluation Steps
Enter an expression to see step-by-step evaluation
When to Use Operator Precedence Table
Complex Expression Debugging
When debugging expressions that don't evaluate as expected, quickly reference precedence rules to understand the actual order of operations and identify issues.
Multi-Language Development
When working with multiple programming languages, reference different precedence rules to avoid confusion and ensure consistent behavior across platforms.
Teaching Programming Concepts
Educators can use this table to teach students about operator precedence, expression evaluation, and best practices for writing clear, readable code.
Code Review Process
During code reviews, reference precedence rules to evaluate whether expressions need additional parentheses for clarity and to prevent potential bugs.
Algorithm Implementation
When implementing mathematical algorithms or complex business logic, ensure correct expression evaluation by referencing operator precedence rules.
Interview Preparation
Prepare for technical interviews by studying operator precedence questions and practicing expression evaluation across different programming languages.
Frequently Asked Questions
What is operator precedence in programming?
Operator precedence determines the order in which operations are performed in an arithmetic or logical expression. Operators with higher precedence are evaluated before operators with lower precedence, similar to the order of operations in mathematics. For example, multiplication (*) has higher precedence than addition (+), so 3 + 4 * 5 equals 23, not 35.
Why do different programming languages have different operator precedence?
Different programming languages evolved independently and made different design decisions. Some languages prioritized mathematical consistency, others focused on readability or compatibility with existing languages. For instance, Python's ** (exponentiation) has different precedence than C's bitwise operators. This is why it's important to reference language-specific precedence tables when working with multiple languages.
How can I remember operator precedence rules?
Most developers don't memorize all precedence rules. It's recommended to use parentheses for clarity in complex expressions and refer to precedence tables when needed. Focus on learning the most common operators like arithmetic (+, -, *, /), comparison (==, !=, <, >), and logical operators (&&, ||). When in doubt, use parentheses to make your intentions explicit.
What is operator associativity?
Operator associativity determines the order of evaluation when operators have the same precedence level. Left-to-right associativity means operations are evaluated from left to right (like 8 - 4 - 2 = 2), while right-to-left means evaluation goes from right to left (like assignment operators: a = b = c assigns c to b, then b to a).
Is this operator precedence table free to use?
Yes, this operator precedence table is completely free to use. You can reference it anytime during development, bookmark it for quick access, and use it for educational purposes without any restrictions. The tool works entirely in your browser and doesn't require any registration or payment.
Which programming languages are supported?
Our table includes operator precedence for major programming languages including C, C++, Java, JavaScript, Python, C#, PHP, Ruby, and Go. Each language has its complete precedence table with associativity rules and practical examples. We regularly update the tables to reflect the latest language specifications.
Can I test expressions with this tool?
Yes, the tool includes an expression evaluator that shows step-by-step evaluation of mathematical and logical expressions. This helps you understand how operator precedence affects the final result and identify potential issues in complex expressions. It's particularly useful for debugging and learning purposes.
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