1. What Is This Calculator?

This calculator evaluates complex mathematical expressions using PHP's eval() function. It supports basic arithmetic operations and follows standard mathematical order of operations.

2. How Does It Work?

The calculator processes mathematical expressions using the formula:

Where:

• expression — A valid mathematical expression
• eval() — PHP function that evaluates the expression

Explanation: The calculator parses and evaluates the mathematical expression following standard arithmetic rules and operator precedence.

3. Supported Operations

Details: This calculator supports addition (+), subtraction (-), multiplication (*), division (/), parentheses for grouping, and decimal numbers. It follows the standard order of operations (PEMDAS/BODMAS).

4. Using The Calculator

Tips: Enter a valid mathematical expression using supported operators. Use parentheses to control calculation order. Examples: "2+3*4", "(2+3)*4", "10/2+5*3".

5. Frequently Asked Questions (FAQ)

Q1: What operations are supported?
A: Basic arithmetic operations: addition, subtraction, multiplication, and division. Parentheses for grouping are also supported.

Q2: Does it follow order of operations?
A: Yes, it follows standard mathematical precedence (multiplication/division before addition/subtraction).

Q3: Can I use decimal numbers?
A: Yes, decimal numbers are fully supported in calculations.

Q4: What happens if I divide by zero?
A: The calculator will detect division by zero and show an appropriate error message.

Q5: Are advanced functions supported?
A: This calculator focuses on basic arithmetic operations. Advanced mathematical functions are not currently supported.