If statement parentheses paradox Topic is solved

[stealzy]

How to explain this behavior?

Code: Select all

If 1 == 1
	MsgBox 1 == 1
If 1 != 1
	MsgBox 1 != 1
	
If (1 == 1)
	MsgBox (1 == 1)
If (1 != 1)
	MsgBox (1 != 1)

[mikeyww]

I believe that with If legacy syntax, the 1 on the left side of the operator is seen as a variable name rather than an expression. See documentation, where it is explained.

The one below is more interesting.

Code: Select all

1 := 1
If 1 = 1
 MsgBox, 64, Result #1, 1 == 1
If 1 == 1
 MsgBox, 64, Result #2, 1 == 1

It's possible that the == cannot be used with legacy If. Others may know more.

I just use expressions in parentheses with If, with only the possible exceptions that the documentation notes.

[stealzy]

Well, but it not explain this:

Code: Select all

x := 1
1 := 1

If x == 1
	MsgBox x == 1

[mikeyww]

Yes, my post explains that.

Stick with the parentheses for expressions.

[stealzy]

I just use expressions in parentheses with If

Same, just curious.

[mikeyww]

My comment is easily verified.

Code: Select all

x = abc
If x == abc
 MsgBox, Test1

[malcev]

How to explain this behavior?

Code: Select all

1 := "= 1"
If 1 == 1
   MsgBox "%1%" = "= 1"

[mikeyww]

Thank you, malcev. That is interesting.

I'd say it shows again that = works in legacy If, whereas == does not (as an operator).

[stealzy]

Thanks @malcev and @mikeyww for clarification .