I have 2 variables, x and y.

I am doing z = x^y.

Now assuming I know only z and y, How can I get x back? Is there an opposite to ^ in JavaScript?

I have 2 variables, x and y.

I am doing z = x^y.

Now assuming I know only z and y, How can I get x back? Is there an opposite to ^ in JavaScript?

• javascript
• xor

• Try this at stackoverflow./questions/4540422/… – asiby Commented Aug 5, 2013 at 20:54

2 Answers 2

Yes, ^ is its own inverse.

x == (x^y)^y

Given z=x^y

You can get x by doing x=z^y