How to tell if a number is positive or negative?

[Bl00dFox]

Hi guys

Im new to visual basic, and I am 14 yrs old, so I beg you to bear with me.

I want to make a simple program that tells you whether the input is a positive number or a negative number. I have tried everything i know, but to no avail.

Please help me

Thanks

[devonknows]

Good afternoon, if the number you are trying to determine is negative or positive is in a text box control then you have to turn it into a long or and integer. (will not work normally as it is determined as a string). So instead of using

If Text1.Text < 0 Then
    MsgBox "Negative"
ElseIf Text1.Text > 0 Then
    MsgBox "Positive"
Else
    MsgBox "Is not a number or is 0"
End If
 

you have to turn them into Longs or Integers with either Clng or Cint for example

If CInt(Text1.Text) < 0 Then
    MsgBox "Negative"
ElseIf CInt(Text1.Text) > 0 Then
    MsgBox "Positive"
Else
    MsgBox "is not a number or is 0"
End If
 

The above code is tried and tested my friend. (ps. you can change it from an Integer to A Long by changing: -

If CInt(Text1.Text ) < 0 Then

to

If CLng(Text1.Text ) < 0 Then

Hope this helps you
Kind regards
Devon.

[willakawill]

Hi. so this will be part of an assignment. Is it the entire assignment or just a part of it?

[markmcgookin]

Hi guys

Im new to visual basic, and I am 14 yrs old, so I beg you to bear with me.

I want to make a simple program that tells you whether the input is a positive number or a negative number. I have tried everything i know, but to no avail.

Please help me

Thanks

So if you are reading in from txtBox1

 
value=ToDouble(txtBox1.Text) 'convert an input into numerical form
 
IF value > 0 'check to see if it is greater than 0
msgbox "Value Entered is positive"
 
ELSE
msgbox "value Entered is negative" 'If it isn't then...
 
 

[Bl00dFox]

Thanks for your reply! I really appreciate your help.

No, this is not part of an assignment, I am trying to make a program that helps you to sketch a parabola by finding concavity, vertex, etc. to help my friends.

I am so stupid! I tried all wierd things like diving by -a, -1 and all random stuff. Thankyou sincererely!

[Killer42]

...I am so stupid! I tried all wierd things like diving by -a, -1 and all random stuff. Thankyou sincererely!

Jumping around trying out lots of ideas can be a good way to not only solve a problem, but learn stuff along the way. But you do need to keep in mind some idea of where you're going, or you could be thrashing around forever.