Why doesn't my if statement work?

[BatMan22]

Why doesn't my first if statement below work? The rest work great. Can you not use "&" in a if statement? Is there a work around for that? 

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Global $ColumnC[5]
Global $ColumnB[5]

Global $testcodeIC1="300.1"
Global $testcodeIC2="218.6"
Global $testcodeIC3="poop"



$ColumnC[0] = "300.1"
$ColumnC[1] = "300.0"
$ColumnC[2] = "poop"
$ColumnC[3] = "zomgnewtestcode"
$ColumnC[4] = "300.1"
$ColumnB[0] = "Sample1"
$ColumnB[2] = "Sample2"
$ColumnB[3] = "Sample3"
$ColumnB[4] = "Sample4"
$ColumnB[4] = "Sample5"

For $i = 0 To UBound($ColumnC) - 1 ;should write zomgnewtestcode to the unknown file, eventually this will prompt me to assign it to IC1, 2, or 3. But for now I just want to debug why the IF statement isn't working.
    If $ColumnC[$i] <> $testcodeIC1 & $ColumnC[$i] <> $testcodeIC2 & $ColumnC[$i] <> $testcodeIC3 Then
        FileWrite(@ScriptDir & "\ICUNKNOWN.txt", $ColumnB[$i] & " " & $ColumnC[$i] & @CRLF)
    EndIf
Next

For $i = 0 To UBound($ColumnC) - 1
    If $ColumnC[$i] = $testcodeIC1 Then
        FileWrite(@ScriptDir & "\IC1.txt", $ColumnB[$i] & " " & $ColumnC[$i] & @CRLF)
    EndIf
Next

For $i = 0 To UBound($ColumnC) - 1
    If $ColumnC[$i] = $testcodeIC2 Then
        FileWrite(@ScriptDir & "\IC2.txt", $ColumnB[$i] & " " & $ColumnC[$i] & @CRLF)
    EndIf
Next


For $i = 0 To UBound($ColumnC) - 1
    If $ColumnC[$i] = $testcodeIC3 Then
        FileWrite(@ScriptDir & "\IC3.txt", $ColumnB[$i] & " " & $ColumnC[$i] & @CRLF)
    EndIf
Next

 

Edited November 18, 2017 by BatMan22

[BatMan22]

Ummm to answer my own question.. apparently you can use AND but not "&" ? Even though you can use & everywhere else? I'm sooooo confused... 

[water]

& is a string concatenator according to the help file.

[Joboy2k]

If ($ColumnC[$i] <> $testcodeIC1) AND ($ColumnC[$i] <> $testcodeIC2) AND ($ColumnC[$i] <> $testcodeIC3) Then
    FileWrite(@ScriptDir & "\ICUNKNOWN.txt", $ColumnB[$i] & " " & $ColumnC[$i] & @CRLF)
EndIf