1. What is Addition?

Addition is one of the four basic operations of arithmetic, combining two or more numbers to form their total or sum. It is fundamental to mathematics and daily life calculations.

2. How Does the Calculator Work?

The calculator uses the addition formula:

Where:

• \( x_1, x_2, \dots, x_n \) — Numbers to be added
• \( n \) — Total count of numbers

Explanation: The calculator takes a comma-separated list of numbers, converts them to numerical values, and sums them all together.

3. Importance of Addition

Details: Addition is essential for basic arithmetic, financial calculations, data analysis, and many real-world applications from shopping to scientific research.

4. Using the Calculator

Tips: Enter numbers separated by commas (e.g., "5, 10.5, 3.2"). The calculator will ignore any non-numeric values in the input.

5. Frequently Asked Questions (FAQ)

Q1: What happens if I enter non-numeric values?
A: The calculator will ignore any values that aren't valid numbers and only sum the numeric values.

Q2: Is there a limit to how many numbers I can add?
A: No practical limit, though extremely large lists may take slightly longer to process.

Q3: Can I add decimal numbers?
A: Yes, the calculator handles both integers and decimal numbers.

Q4: What about negative numbers?
A: Negative numbers are supported and will be included in the sum.

Q5: How precise is the calculation?
A: The calculator uses PHP's floating-point arithmetic, which provides good precision for most practical purposes.