ZX BASIC:IF
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[edit] IF
IF is a very powerful control flow sentence that allows you to make decisions under specified contitions.
[edit] Syntax
IF expression THEN sentences [ELSE sentences] END IF
[edit] Example
IF a < 5 THEN PRINT "A is less than five" ELSE PRINT "A is greater than five" END IF
Sentences might be in multiple lines:
If a < 5 Then Print "A is less than five" a = a + 5 Else Print "A is greater than five" End If
Since IF is a sentence, it can be nested; however, remember that every IF must be closed with END IF:
If a < 5 Then Print "A is less than five" If a > 2 Then Print "A is less than five but greater than 2" End If Else If a < 7 Then Print "A is greater or equal to five, but lower than 7" Else Print "A is greater than five" End If End If
[edit] Remarks
- This sentence is extended and not compatible with the Sinclair BASIC version: Every IF must be closed with END IF

