1. What is a D20 Dice Roll?

A D20 (20-sided die) is a polyhedral die used in various tabletop games, most notably in role-playing games like Dungeons & Dragons. It produces random numbers between 1 and 20, with each number having an equal probability.

2. How Does the Roller Work?

The roller uses PHP's random number generator to simulate fair dice rolls:

Explanation: The function generates a pseudorandom integer between 1 and 20 (inclusive) with uniform distribution.

3. Importance of Random Rolls

Details: True randomness is crucial for fair gameplay in tabletop RPGs. Digital rollers help ensure unbiased results compared to physical dice that might have imperfections.

4. Using the Roller

Tips: Enter the number of rolls (1-10) and click "Roll Dice". Results will appear instantly. Refresh or roll again for new random numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is this roller truly random?
A: It uses PHP's pseudorandom number generator which is sufficiently random for gaming purposes, though not cryptographically secure.

Q2: Can I roll more than 10 dice at once?
A: The calculator limits to 10 rolls at once for performance and display reasons.

Q3: What's the probability distribution?
A: Each number (1-20) has an equal 5% chance of appearing on any given roll.

Q4: Can I use this for critical hits?
A: Yes, in most RPG systems, 20 is a critical success and 1 is a critical failure.

Q5: Does this work for other dice types?
A: This calculator is specifically for D20 rolls, but the same principle applies to other polyhedral dice.