"not in" for arrays in Javascript
MattyB10 (0)

Python is my main language, but I am trying to learn Javascript. In python, you could say "variable not in list". I don;t know how to do this in JS and I can;t find it anywhere. If you could help that would be great. I have posted a pic below, the blue circle is where the problem lies. Also, courses is a list, and z is an input.

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mat1 (2877)
if (!list.includes(variable))

.includes checks if the list does include variable, and the exclamation point makes it check if it's not true.
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