Simple IF statement with `$SystemWordLength` not working

Questions
,
1

Simple IF statement not working. Not sure what I am doing wrong. I want to print 32 if the negation of 64 is false and 64 otherwise

If[!($SystemWordLength = 64),32, 64]
2

Does it work with Equal (==) instead of Set (=)?

3

yes It works!! Thanks.. I still confuse her and then when use the SET == and the Equal = is applied. Thanks very much! Also.. Can you comment what is best practice

If[! $SystemWordLength == 64, 32, 64]

(*or*)

If[! ($SystemWordLength == 64), 32, 64]

(*or*)

If[(! $SystemWordLength == 64), 32, 64]
4

That’s enough

 If[$SystemWordLength != 64, 32, 64]
5

I believe that on all platforms supported today, just using

$SystemWordLength

will return the same number as the If statement, so that may suffice.