How does equalsIgnoreCase work?

Question

When using equalsIgnoreCase, do you write it as
(example) word.equalsIgnoreCase("b")=B;
or you write it as word.equalsIgnoreCase("b"); ?

Answer 1

It would just be word.equalsIgnoreCase("b");

Answer 2

Either way would be fine. The formula already ignores case.

Answer 3

string.equalsIgnoreCase() returns a boolean value (usually used in conditional statements)
word.equalsIgnoreCase("b")=B is not valid at all. =B means assigning value of B to the left.
So only word.equalsIgnoreCase("b") is right.