Wish Dim if a for next loop

JakeBullet70 · Feb 13, 2014

Hi all

right now we do:

B4X:

Dim s as String = "Its a string" '--- love how we can do this

Dim x As Int
For x = 0 To 100
Next

can we get

B4X:

For x as Int = 0 To 100
Next

or is there a way to do this and I am missing it?

stevel05 · Feb 13, 2014

You only need to do

B4X:

For x = 0 to 100
Next

No need to dim it first. It will be done automatically.

JakeBullet70 · Feb 13, 2014

This is true. I am just so use to Dim'ing everything.

I wonder if there is a performance hit at all if you do not Dim it?

Erel · Feb 13, 2014

See For documentation: http://www.b4x.com/android/forum/pages/results/?query=for&page=1&prefix=0

The variable will be declared as an Int variable. There is no performance hit.

tzfpg · Feb 14, 2014

how about using exit for? i add "exit for" return back error message.

B4X:

For k = 0 To Buffer.Length - 1
If int_hex>25 Then
full_hex(int_hex)=msg
Else
int_hex=0
Exit For
End If
Next

error message:

Parsing code. Error
Error parsing program.
Error description: Missing Keyword: next
Occurred on line: 88
End If

klaus · Feb 14, 2014

This code works:

B4X:

For k = 0 To Buffer.Length - 1
    If int_hex > 25 Then
        full_hex(int_hex) = msg
    Else
        int_hex = 0
        Exit
    End If
Next

tzfpg · Feb 14, 2014

Thanks, solved my problem.

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