Contest 14 - DnD Dice Roller

[dday9]

Programming Contest – DnD Dice Roller

For all those who haven't participated in the contest please read the FAQ

Overview
Given an input of dungeons and dragons dice commands, have the program execute the commands and show the user the results.

For example, if I input 1D20 1d% then the program should output:

1D20 - 16
1d% - 60

Languages
C#, F#, JavaScript (vanilla ES5), LUA, Python, Visual Basic 6, and VB.Net

Deadline
October 2nd, 2020

Rules for Contest
The rules followed will be specific to the contest and not the game.

• You must submit the source code and include a fiddle(ideone, dotnetfiddle, codepen, etc.)
• You are responsible for determining the syntax of the dice command
• Allow for multiple dice commands
• Include a help menu to assist the user
• Acceptable dice types are:
  
  1. 4-sided
  2. 6-sided
  3. 8-sided
  4. 10-sided
  5. 12-sided
  6. 20-sided
  7. Percentage (percentages include increments of 10 from 0 - 90)

Marking
Each entry will be judged on the following things.

• Accuracy - Does the program follow all of the rules?
• Length - How concise is the submitted code?
• Execution - How quick did the code execute?
• Efficiency - How efficient is the algorithm(s) you chose?

Prizes
You will get to brag that you won a VBForums contest and I'll also include a special avatar!

Please submit all entry's to the forum below with the title in the following format "Contest 14 - DnD Dice Roller - [User Name]"
Contest Entries Forum