SEE
Select
Case Statement in Language Reference A - Z, for exact syntax and code
examples.Scripting Language Elements
BlueZone Basic has complete process control functionality. The control structures available are Do loops, While loops, For loops, Select Case, If Then , and If Then Else. In addition, BlueZone Basic has one branching statement: GoTo. The Goto Statement branches to the label specified in the Goto Statement.
Goto label1
.
.
.
label1:
The program execution jumps to the part of the program that begins with the label "label1:".
The Do...Loop allows you to execute a block of statements an indefinite number of times. The variations of the Do...Loop are Do While, Do Until, Do Loop While, and Do Loop Until.
Do While|Until condition
statement(s)...
[Exit Do]
statement(s)...
Loop
Do Until condition
statement(s)...
Loop
Do
statements...
Loop While condition
Do
statements...
Loop Until condition
Do While and Do Until check the condition before entering the loop, thus the block of statements inside the loop are only executed when those conditions are met. Do Loop While and Do Loop Until check the condition after having executed the block of statements thereby guaranteeing that the block of statements is executed at least once.
The While...Wend loop is similar to the Do While loop. The condition is checked before executing the block of statements comprising the loop.
While condition
statements...
Wend
The For...Next loop has a counter variable and repeats a block of statements a set number of times. The counter variable increases or decreases with each repetition through the loop. The counter default is one if the Step variation is not used.
For counter = beginning value To ending value [Step increment]
statements...
Next
The If...Then block has a single line and multiple line syntax. The condition of an If statement can be a comparison or an expression, but it must evaluate to True or False.
If condition Then statements... ' Single line syntax.
If condition Then
' Multiple line syntax.
statements...
End If
The other variation on the If statement is the If...Then...Else statement. This statement should be used when there is different statement blocks to be executed depending on the condition. There is also the If...Then...ElseIf... variation, these can get quite long and cumbersome, at which time you should consider using the Select statement.
If condition Then
statements...
ElseIf condition Then
statements...
Else
End If
The Select Case statement tests the same variable for many different values. This statement tends to be easier to read, understand and follow and should be used in place of a complicated If...Then...ElseIf statement.
Select Case variable to test
Case 1
statements...
Case 2
statements...
Case 3
statements...
Case Else
statements...
End Select
SEE
Select
Case Statement in Language Reference A - Z, for exact syntax and code
examples.