Getting confused with == and = in “if” statement

Question

I know that we cant use assignment operator in if statements in java as we use in any other few languages.

that is

            int a;

            i         


        

Answer 1

The rule is not that "assignment can't be used in an if statement", but that "the condition in an if statement must be of type boolean". An assignment expression produces a value of the type being assigned, so Java only permits assignment in an if statement if you're assigning a boolean value.

This is a good reason why the style if (foo == true) should be avoided, and instead simply write if (foo).