Javascript addition and subtraction with a string value

Question

I recently went through this typecast JS question:

Given \'11\'+10, the answer is 1110. It is clear that is not 21 because one

Answer 1

+ sign is used for both Number and String concatenate. So it considers as two string concatenate when it found string first. You can use + prefix or Number to convert string to number

But - sign is used for subtraction only applicable to number. So it automatically converts string to number.

Following will solve your issue

(+'11') + 10
(+'11') - 10

(or)

 Number('11') + 10
 Number('11') - 10