Bisection Computational Method not working

Question

Here is the Python program for finding the square root of 2, which works fine
https://code.sololearn.com/cA140a5A21a3
Here is the Javascript program for finding the square root of 2, which doesnt work, instead returns undefined
https://code.sololearn.com/ca9a1A1783A2

Answer 1

Wilbur Jaywright
Line no.24 will never get executed

Answer 2

I looked further at the code and realize my answer was embarrassingly incorrect. Sorry