Numeric Value of instead String...

[osmansirmali]

Hi

We are using below code example for string value...

global string temp = " "
if((IsEmpty(temp))
.........
else
.........
endif

But I want use numeric value for same purpose...

global temp = 0
if((??????(temp))
...........
else
...........
endif

If Temp = NaN Which can I use instead of IsEmpty() for Control of Temp

Best regards.

Osman

[AzeoTech]

Actually, I don't think IsEmpty() is what you want in either case. IsEmpty() is for determining if a value has been assigned to a variable yet or not. For an empty string you can do the simple comparison:

global string temp = " "
if (temp == "")

but that won't pick up if you have a string with just spaces in it. In that case you want:

global string temp = " "
if (ltrim(temp)) == "")

Basically "" is a valid string and so isempty() will always return false. If you had this:

global string temp
if (isempty(temp))

then isempty() would evaluate to true, at least the first time around. If you ran the sequence again after setting temp to some value it would return false. See the difference?

As for numbers, its basically the same. IsEmpty() only works if the variable has never been assigned a value. If it is NaN(), you can do:

global temp = NaN()
if (temp == NaN())

Just remember that NaN() is a function that returns NaN, not a constant, so you need the (). Same goes for Pi() and most other numeric constants.