[RESOLVED] [02/03] geting the average grade using listbox

[creamoreo]

What command should i use for me to compute the grade thaht was listed on the list box..that the user will input..

[Atheist]

Welcome to the forums man.
You will have to explain some more for us, what do you mean by grade? And "how to compute the grade" is a very unclear question, by compute you can mean alot of things.

[creamoreo]

for example.. the user will input a number in the listbox example {78,90,89,....} the i will click the average button then it will compute the total average of the numbers that was input to the listbox

[Atheist]

ah ok. Well you know how average values are calculated, correct?
Add all the values together and divide by the number of values.
So just do

dim dblTotal as Double = 0
For each str as string in ListBox1.Items
     dblTotal += Double.Parse(str)
Next
dblTotal = dblTotal / ListBox1.Items.Count

[creamoreo]

i see..thanks..

[Atheist]

You're welcome. If your problems are solved than resolve your thread using the thread tool menu at the top of the thread. Or do you want more explanation to the code?

[creamoreo]

oh.pls explain how this code works...thanks

[creamoreo]

what about for example i will clear the listbox but there is no list at all, when i click the clear button it should show a message box that "no list to be cleared"..