For Next Counter
Community Forums/General Help/For Next Counter
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Send me Somebody help, can not understand when to use the meter after a For Next loop counter . What it does? |
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Don't do it. |
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?? What I do ? I wonder at what point the counter is used to end a loop Next counter is optional. |
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@Yue, you end your counter to iterate all items in your array or how many times you like to reiterate until the last item or number of items is processed. depends up to you. Using STEP get things more complicated but try with the basics first. You can use while wend and add a counter inside.. counter = 0 while counter <= 10 ... counter = counter + 1 wend |
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Is That I'm Trying to endeder the loop to the next . But optionally Following the end , I can Restarting the variable. And no logo understand when is that I do this and under what conditions. For K = 1 to 10 .... Next K |
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I can't really understand what you would like to know or what you're trying to achieve Yue. If you can give some example it would be more clear. |
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I just want understand this. http://support.microsoft.com/kb/36809/en-us |
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That article has nothing to do with Blitz. It is about a different programming language. There is no useful information about Blitz in Microsoft's documentation. Information about one Basic "dialect" cannot be applied to others. They are completely different languages with no connection to each other. Just don't worry about it and keep doing whatever you were doing before. |
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Ahhh....that article basically means this: Say we have a loop: for i = 0 to 10 ;do stuff in here next - that is all fine and good. If we put a loop inside another loop we could do it like this: for i = 0 to 10 for j = 0 to 10 ;do stuff in here next next - that is all fine as well. However, Say I used the same loop counter variable "i" in both loops..... for i = 0 to 10 for i = 0 to 10 ;do stuff in here next next This will run differently than you would expect. Because blitz doesn't define the variable "i" as local to each loop what will happen in blitz is that the inner loop will run once, the variable "i" will be greater than 10 on exiting the inner loop and then will jump out of the outer loop as well. |
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I feel like I've wandered into the middle of Bill & Teds Bogus Journey. |
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The loop ends when the index variable has the same or greater value as the value after the 'To' keyword. eg. For index_variable = 1 To 10 Print index_variable Next will count from 1 to 10 in units of 1. If you want to count in different units then add the Step keyword after the 'To' value, followed by the Step value you want to use (note that the Step value must be a constant or literal value. It can't be a variable value.). eg. For index_variable = 2 To 8 Step 2 Print index_variable Next will count from 2 To 8 in units of 2 (2, 4, 6, 8). If you want to break out of the loop before it is finished then use the 'Exit' keyword. eg. For index_variable = 1 To 10 If index_variable = 5 Then Exit Print index_variable Next will count from 1 To 5 before exiting the loop. If you have multiple nested loops then you'll need to use a variable as a flag to force exiting them. eg. do_exit = False For y = 1 To 10 For x = 1 To 10 If x = 5 Then do_exit = True : Exit Print x + " | " + y Next If do_exit Then Exit Next |