Checking for NaN and using it in an If
118243
How do you test to see if a double is equal to NaN?
5377
Is there a standard function to check for null, undefined, or blank variables in JavaScript?
75261
How to tell whether value is NaN without using isNaN, which has false positives?
84998
python - checking odd/even numbers and changing outputs on number size
92055
In JavaScript, why is "0" equal to false, but when tested by 'if' it is not false by itself?
135685
Arguments to If[] are not evaluated
4419
"is" operator behaves unexpectedly with integers
107569
Conditional check for "i == (2^8)" fails when i is 512?
157822
Does a javascript if statement with multiple conditions test all of them?
34585
How to check if a String is numeric in Java
94864
What is a more elegant solution to these nested if/elseif statements?
124650
Is `if (condition = value)` the correct syntax for comparison?
10593
How to test whether something is identically NaN?
53870
Error in if/while (condition) {: missing Value where TRUE/FALSE needed
110532
Using if statement with ArcPy and GetCount?
150297
One-liner if statements, how to convert this if-else-statement
126772
How do I get the NOT, NAND, NOR and XNOR logic gates to work?