Hey everyone,

I have a task that I have to make a windows form application, that calculates the number factorial of any positive number, and the result shows the multiplication of factorials. Like here,

5! = 1*2*3*4*5* = 120

the form design is simple,

1. label1 ( enter the number)

2. textbox1

3. button1 ( named calculate // that shows the message in new messagebox.

the message also has to show if the input is wrong or right.

**************the condition is to use for or while loop method**************