IF-THEN-ELSE-END IF
(→Example) |
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| Line 100: | Line 100: | ||
Dim A As Integer | Dim A As Integer | ||
A = 10 | A = 10 | ||
| − | If A = 10 Then | + | If A = 10 Then 'test expression |
| − | Print "This part is executed." | + | Print "This part is executed." 'this will be printed |
Else | Else | ||
| + | Print "This will never be executed." 'this not | ||
| + | End If | ||
| + | If A = 10 Then Print "New in BASCOM" | ||
| + | If A = 10 Then Goto Label1 Else print "A<>10" | ||
| + | Label1: | ||
| + | |||
| + | Rem The following example shows enhanced use of IF THEN | ||
| + | If A.15 = 1 Then 'test for bit | ||
| + | Print "BIT 15 IS SET" | ||
| + | EndIf | ||
| + | Rem the following example shows the 1 line use of IF THEN [ELSE] | ||
| + | If A.15 = 0 Then Print "BIT 15 is cleared" Else Print "BIT 15 is set" | ||
</source><br/>{{Languages}} | </source><br/>{{Languages}} | ||
[[Category:BASCOM Language Reference]] | [[Category:BASCOM Language Reference]] | ||
Latest revision as of 00:05, 21 February 2013
Contents |
Action
Allows conditional execution or branching, based on the evaluation of a Boolean expression.
Syntax
IF expression THEN
[ ELSEIF expression THEN ]
[ ELSE ]
END IF
Remarks
|
Expression |
Any expression that evaluates to true or false. |
The one line version of IF can be used :
IF expression THEN statement [ ELSE statement ]
The use of [ELSE] is optional.
Tests like IF THEN can also be used with bits and bit indexes.
IF var.bit = 1 THEN
^--- bit is a variable or numeric constant in the range from 0-255
You can use OR or AND to test on multiple conditions. The conditions are evaluated from left to right.
IF A=1 OR A=2 OR A=3 OR B>10 THEN
IF A=1 AND A>3 THEN
Dim Var As Byte, Idx As Byte
Var = 255
Idx = 1
If Var.idx = 1 Then
Print "Bit 1 is 1"
EndIf
See also
Example
Dim A As Integer A = 10 If A = 10 Then 'test expression Print "This part is executed." 'this will be printed Else Print "This will never be executed." 'this not End If If A = 10 Then Print "New in BASCOM" If A = 10 Then Goto Label1 Else print "A<>10" Label1: Rem The following example shows enhanced use of IF THEN If A.15 = 1 Then 'test for bit Print "BIT 15 IS SET" EndIf Rem the following example shows the 1 line use of IF THEN [ELSE] If A.15 = 0 Then Print "BIT 15 is cleared" Else Print "BIT 15 is set"
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