For the example above if we run all of the statements at once it will only give us the answer to the last comparison. This is a caveat of Repl.it. Even though we are not telling the console to print, ...

The === operator (and the == operator as well) treats the number values -0 and +0 as equal and treats Number.NaN as not equal to NaN. Equality (==) The equality operator converts the operands if they ...