1. What is the Addition Function?

The addition function performs basic arithmetic addition of two numbers. It is one of the four elementary mathematical operations of arithmetic.

2. How Does the Calculator Work?

The calculator uses the addition formula:

Where:

• \( x \) — First number
• \( y \) — Second number

Explanation: The function simply adds the two input numbers together to produce the sum.

3. Importance of Addition Calculation

Details: Addition is fundamental in mathematics and daily life, used in everything from basic counting to complex financial calculations.

4. Using the Calculator

Tips: Enter any two numbers (positive, negative, or decimal) and click calculate to see their sum.

5. Frequently Asked Questions (FAQ)

Q1: What types of numbers can I add?
A: You can add integers, decimals, positive and negative numbers.

Q2: Is there a limit to the size of numbers?
A: The calculator can handle very large numbers within the limits of PHP's floating point precision.

Q3: How precise are the results?
A: Results are rounded to 2 decimal places for readability.

Q4: Can I add more than two numbers?
A: This calculator only adds two numbers at a time. For multiple numbers, you would need to chain calculations.

Q5: What about adding non-numeric values?
A: The calculator only accepts numeric input and will show an error for non-numeric values.