> For the complete documentation index, see [llms.txt](https://www.pythonclassroom.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.pythonclassroom.com/loops/while-loop-menu/while-loop-sentinel-menu.md).

# Problems

## Problem 1

Create another menu item called

print("E - Convert Euros")

Currently 1 Euro equals 1.14 USD.

Print the equivalent amount of money in USD. Enter Euros and test several amounts.

## Problem 2

Create another menu item called

print("C - Convert Bitcoin")

Currently 1 Bitcoin equals 3407 USD.

Print the equivalent amount of money in USD. Enter Bitcoins and test several amounts.

## Problem 3

Create another menu item called

print("R - Robux")

Currently 1 USD equals 80 Robux.

Print the equivalent amount of money in Robux.

## Problem 4

Create another menu item called

print("SUM - Sum numbers")

Using a while loop, ask the user how many minutes they’ve studied this month until the user enters -1.

Print the sum.

## Problem 5

Create another menu item called

print("F - Factorial")

The notation n! Represents the factorial of a nonnegative number n. The factorial of n is the product of all the nonnegative integers 1 to n.

For example, 5! = 5 *4* 3 *2* 1 = 120.

Use a while loop to calculate the factorial of that number. Print the factorial.


---

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