AI solution for JavaScript Quiz on BFE.dev
105. typeof

The code will output "not a string".

This is because of the use of the negation operator (!) before the typeof operator. The precedence rules of JavaScript will first evaluate the typeof operator, which will return the string "string" in this case. Then, the negation operator will invert the boolean value of the expression, so it will become false.

Therefore, the else block will execute and print "not a string" to the console.