Minor Documentation Fix - mIRC Discussion Forums

In the page "if then else" on mirc's helpfile it says:

Code:

The ! not prefix
You can use the ! prefix in front of variables and identifiers in an if-then-else statement to negate a value. The following statements are equivalent.

if (%x == $null) echo x has no value

if (!%x) echo x has no value

which is wrong, this is not a major problem, but should be fixed in next version, since it might get some people confused.

How are you determining that those two lines are not the same? I've used this option (ie: using !%var rather than %var == $null) many times, and I have yet to see it fail.

if (%x == $null) will only be $true when %x is $null.
if (!%x) will be $true if %x is 0, $false or $null

Fairly big difference.

if (!%x) would be true if %x were $false or $null or 0 or 0000000 ... any negative value or no value at all.

if (%x == $null) would only be true if %x has no value at all.

~ Edit ~

hixxy beat me to it

Quote:

if (!%x) would be true if %x were $false or $null or 0 or 0000000 ... any negative value or no value at all.

if (%x == $null) would only be true if %x has no value at all.

~ Edit ~

hixxy beat me to it

not true for negative values (only $false, 000...000, $null)

Your examples are the same negative values I (and hixxy) gave.
And I did mean negative value for %x not negative number.
-1 is a negative number but would not be a negative value for %x