4.19 FAQ-378 How to declare a variable for missing value?

Declare-Variable-for-Missing-Value

Last Update: 2/4/2015

You could declare a variable with expression 0/0 to define it as a missing value. For example:

misval = 0/0;
misval =;//Should return --

In addition, in LabTalk, a missing value is evaluated as False. For example:

misval = 0/0;
type $(misval?1:0);//Should return 0 (False)

Keywords:missing value, declare, variable, false