Hey could you please tell me why this happens when I add
var a = 3
var b = "2"
console.log(a + b ) // 32
the above output is right But when I do subtraction then it shows
console.log(a - b ) // 1
and it is the same for multiplication (o/p:- 6) and when I divide the output is (1.5) why this is happing when I do other arithmetic operations except for addition.
The '+' operator when operated on string does concatenation. The 'b' variable is a string literal and thats why you are getting output '32'.
The + operator is pecial in this sense. It will add numbers, but concatenate if it encounters a string.
However, a behavior like this makes no sense for other operators.
For example, what do you expect "foo" - 2 to do? And "foo" / 3? Divide "foo" into 3 parts? Then what about 3 / "foo"?
So, the general rule is rather that arithmetic operators always coerce their arguments to numbers, and the addition / concatenation operator(+) is the only exception.
Actually, the comparison operators (<, <=, >, >=) can also work on strings, but those aren't arithmetic operators.
