# Strange behavior using ternary operator

Go to solution Solved by Melba23,

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Can someone shed light on the following problem:

```For \$ix = 0 To 3
\$i = \$ix
\$i1 = (\$i = 1 Or \$i = 2 ? \$i : 0) ; This shows TRUE if \$i = 1     WHY ?
\$i = \$ix
\$i2 = (\$i = 2 Or \$i = 1 ? \$i : 0) ; This shows TRUE if \$i = 2     WHY ?
\$i = \$ix
\$i3 = ((\$i = 1 Or \$i = 2) ? \$i : 0) ; This is OK. It shows always the digits 0, 1 or 2
\$i = \$ix
\$i4 = ((\$i = 2 Or \$i = 1) ? \$i : 0) ; This is OK. It shows always the digits 0, 1 or 2

MsgBox(Default, \$ix, "\$i1: " & \$i1 & @LF & "\$i2: " & \$i2 & @LF & "\$i3: " & \$i3 & @LF & "\$i4: " & \$i4 & @LF, 0)
Next```

App: Au3toCmd              UDF: _SingleScript()

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• Solution

Exit,

It looks like an "operator priority" problem to me. The first 2 are actually Oring \$ix = 1/2 and the result of the ternary - which is why you get a Boolean return. Once you add a few more parentheses to determine the evaluation order you get the expected results.

I always use external and internal parentheses when using ternary operations to avoid such problems:

`( ( Expression ) ? ( True result ) : ( False result) )`
Now there is no doubt how AutoIt should parse the content.

M23

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