How can you make a if statement that a prompt tags value is not any value of a array?

Question

So a example will be alerting(Using alertia which makes cool alerts) if the prompt value is not a array.
So my code has a 32 amount of values in my array.
Then I wrote a if statement. if (askPrompt == keywords[0]) {
//alert than it isn’t a good variable name.
}
But it would take forever to write keywords[0] to keywords[31] for array indices.

Answer 1

if (!keywords.includes(varName)) {
alert("Not a valid variable name")
}

Answer 2

My code:
https://code.sololearn.com/WR4Zxs9b6Pq0/?ref=app