Allows conditional execution or branching, based on the evaluation of a Boolean expression.
IF expression THEN
[ ELSEIF expression THEN ]
[ ELSE ]
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"
Dim A As Integer
A = 10
If A = 10 Then 'test expression
Print "This part is executed." 'this will be printed
Print "This will never be executed." 'this not
If A = 10 Then Print "New in BASCOM"
If A = 10 Then Goto Label1 Else print "A<>10"
Rem The following example shows enhanced use of IF THEN
If A.15 = 1 Then 'test for bit
Print "BIT 15 IS SET"
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"