Having a rough time understanding IsNaN coding function

[jngy2k]

Anyone have some simple code examples that can explain the function?

 

[MerryDay]

When you search this forum for Isnan, it comes back with 751 examples of it used

 

[BenTen]

You can try the following links:

• https://tlc.thinkorswim.com/center/reference/thinkScript/Functions/Math---Trig/IsNaN
• https://usethinkscript.com/google-search/?q=Isnan

Wish I could help. I have only been using double.nan so I'm not sure.

 

[mfsteve]

Use IsNaN to test whether a variable is set to a valid number versus N/A:

def myvar1 = 5;
AddLabel(yes, myvar1 + " is a number", if IsNaN(myvar1) then Color.RED else Color.GREEN);

def myvar2 = if close > 3000000 then close else double.nan;
AddLabel(yes, myvar2 + " is not a number", if IsNaN(myvar2) then Color.RED else Color.GREEN);

 

[rad14733]

Double.Nan is used to make a variable assignment... IsNan is a comparator used to test numeric presence...