OpenOffice.org BASIC Guide.pdf - OpenOffice.org wiki

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Principal Authors: Fpe, Ccornell, Pitonyak
Loops
A loop executes a code block for the number of passes that are specified. You can also have
loops with an undefined number of passes.
For. . . Next
The For...Next loop has a fixed number of passes. The loop counter defines the number of
times that the loop is to be executed. In the following example, variable I is the loop
counter, with an initial value of 1. The counter is incremented by 1 at the end of each pass.
When variable I equals 10, the loop stops.
Dim I
For I = 1 To 10
' ... Inner part of loop
Next I
If you want to increment the loop counter by a value other than 1 at the end of each pass,
use the Step function:
Dim I
For I = 1 To 10 Step 0.5
' ... Inner part of loop
Next I
In the preceding example, the counter is increased by 0.5 at the end of each pass and the
loop is executed 19 times.
You can also use negative step values:
Dim I
For I = 10 To 1 Step -1
' ... Inner part of loop
Next I
In this example, the counter begins at 10 and is reduced by 1 at the end of each pass until
the counter is 1.
The Exit For instruction allows you to exit a For loop prematurely. In the following example,
the loop is terminated during the fifth pass: