Detecting undefined list positions

Questions
1

There must be a better way:

2

Hey Steve,

One way to check for undefined values is checking that the absolute value of a value is greater than or equal to zero.

Hopefully this graph is helpful!

3

Thanks, Schuyler,

cool trick!

Your graph was quite helpful!

4

You also need to add infinity into your inequality… See here.

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5

I think you can also just do L[L=L]

6

It doesn’t catch infinity. https://www.desmos.com/calculator/f3vcm8hw0w

7

Good to know! I never ran into that I guess.