javascript multiple OR conditions in IF statement

Question

I think I'm missing something basic here. Why is the third IF condition true? Shouldn't the condition evaluate to false? I want to do something where the id is not 1, 2 or 3.

var id = 1;
if(id == 1) //true    
if(id != 1) //false 
if(id != 1 || id != 2 || id != 3) //this returns true. why?

Thank you.

Answer 1

With an OR (||) operation, if any one of the conditions are true, the result is true.

I think you want an AND (&&) operation here.