Why this "7" is a string?

Answer 1

Actually, it is equal to 7 but not triple-equal.

7 == "7"; //compares the value, which is the same(true)
7 === "7"; //compares the variable type, number to text(false)

Answer 2

Because its inside the quotation marks. ""

7 is not equal to "7"

Answer 3

Thanks. Now I'm understand.