Syntax help: vbscript equivalent of break

g2000 · #1 (**permalink**) July 29th, 2005, 10:33 AM

Java version
for(int i=0; i<10; i++) {

  if (condition)
    continue; // that gets to next iteration
  doWhatever();
}
How about the vbscript? Any keyword for that?

For i = 0 to 10
  if (condition) then
     ????? ' what to put???
  End if
  doWhatever

Next

mmcdonal · #2 (**permalink**) July 29th, 2005, 10:42 AM

I am not sure what you want to do with this code.

If you want to check a condition (for example, i = 1) and do something if the condition is met, then it is:

For i = 0 To 10
   If i = 1 Then
      'doWhatever
   End If
i = i + 1
Next

Is this what you want? For goodness sakes, don't for get to iterate your counter.

mmcdonal

spark86 · #3 (**permalink**) July 10th, 2006, 03:24 PM

You dont want to iterate the i unless you plan to step by 2 and not 1

spark86 · #4 (**permalink**) July 10th, 2006, 04:05 PM

to exit a for loop like what jScript dose w/ break
it would be Exit For
for a do loop: Exit Do

Tandy1000SL GW-BASIC · #5 (**permalink**) April 22nd, 2009, 05:34 AM

"For...Next" Loop looks like this.

Code:

 
Dim Counter
 
For Counter = 1 to 10
     MsgBox Counter
Next     'Counter

To [BREAK] out of the "For...Next" Loop, you will want to insert a Code Sequence. Most likely with some sort of User Input Sequence such as with the InputBox Statement.

Code:

 
Dim Counter
Dim strCounter
 
For Counter = 1 to 10
     MsgBox Counter
     strCounter = InputBox("?Do you want to Continue?")
          If strCounter = "" Then
               Counter = 11
          End If
Next     'Counter

A better method would be to use a MsgBox "?Do you want to Continue?" with the "VbYesNo" Constant; as well as, the "VbYes" and "VbNo" Constants in place of the InputBox Sequence; but, I'm not familiar enough with VBScript to write such a sequence at this time.

I am new to VBScript; thus, I only know how to use InputBox for User Inputs in VBScript Codes at this time.

With GW-BASIC, all you needed was a GOTO Statement to [BREAK] out of the "For...Next" Loops because all the Command Lines were numbered.

With GW-BASIC, you could also use the INKEY$ Statement to [BREAK] out of the "For...Next" Loop.

I haven't tested out my Input Sequence; thus, if you get a "Subscript Out Of Range" Error, you should change the Counter = 11 Command Line to Counter = 10.

Old Pedant · #6 (**permalink**) April 22nd, 2009, 06:01 PM

Don't answer posts that are FOUR YEARS OLD. All you do is clutter up the forums.

Also, your answer is wrong. Or at least not as simple and not as correct as the prior post by spark86

Tandy1000SL GW-BASIC · #7 (**permalink**) April 30th, 2009, 08:57 PM

ONE
I am new to these forums.

It is apparent to me that I have to edit my Forum Settings so that the Newest Topic Threads are listed first.

TWO
What the Original Poster wanted was to be able to Press a [KEY] to Break a "For...Next" Loop.

"Spark86" suggestion isn't that; as far as I know. I am new to VBScript myself; but, I am very familiar with GW-BASIC, which has the Press a [KEY] To Break out of a "For...Next" Loop feature.

The reason I suggested an InputBox is because the Computer User can Press [ENTER] to Break Out of a "For...Next" Loop. Pressing anything else, will result in the "For...Next" Loop to continue.

Old Pedant · #8 (**permalink**) May 1st, 2009, 05:04 AM

Quote:

What the Original Poster wanted was to be able to Press a [KEY] to Break a "For...Next" Loop.

I'm sorry, but you are showing your ignorance of other programming languages when you say that.

I understand you think he was talking about pressing some kind of "break" key, but no, he wasn't.

In C and C++ and Java and JavaScript and C# and PHP and various other languages, the keyword break is used to prematurely exit from a loop (as it turns out, from any kind of loop).

Example in javascript:

Code:

for ( var i = 1; i <= 100; ++i )
{
    document.write("This is iteration " + i + "<br />" );
    if ( i > 17 ) break;
}

That loop will *NOT* execute 100 times, as you might think from reading the for line.

Instead, it will execute 18 times, because on the 18th iteration the variable i is indeed greater than 17 and the break keyword says "exit from the enclosing loop."

And *THAT* is what the original poster in this thread meant when he asked if there is any VBScript equivalent of the JAVA keyword break. (And Java also has a continue keyword which he was asking about, at the same time.)

And, yes, the EXIT FOR and EXIT DO keywords are the closest equivalents, in VBScript and in VB6 and in VB.NET, of the Java break keyword.

mmcdonal · #9 (**permalink**) May 1st, 2009, 08:06 AM

Don't answer posts that are FOUR YEARS OLD. All you do is clutter up the forums.

Old Pedant · #10 (**permalink**) May 1st, 2009, 03:42 PM

Well, that's what I first said to Tandy. But, really, this hopefully *IS* serving to make him rethink what he thought he knew about VBScript. So in that sense, it's up-to-date. Clearly he needs help learning the fundamentals of the language.