I have seen a bunch of articles talking about "what is an expression in Js?" but some of them said that "an expression in Js is any piece of code that produces a value" like this one 4 + 4, so this one is of course an expression the value that this will produce is 8, but what about if we only a single value of type:x, like this: 4, they also said that this is an expression but this really doesn’t match or isn’t too accurate with the previous definition, and the other case is that if we do this x = 2, that is considered also an expression an if we move forward x is also an expression, so, what really is an expression? is there different types of expression in Js? which ones are this? what are they differences? what is the really accurate definition for this concept?, please someone with this knowledge I really appreciate if you can clarify this to me!
4 + 4is a fine way to think about what some documentation means when it says "expression".4is syntactically valid and produces a value.4+4,4,x = 2,xall are expressions in JS code. You might want to take a look at some things that are not expressions to understand the difference.