In this screencast, Bisection method to calculate the root of a nonlinear equation f(x)=0 has been demonstrated and programmed. The method begins with an interval [a,b], where f(a) and f(b) have opposite signs. According to mean value theorem, there will be a root (a point c, such that f(c)=0). The algorithm has been converted to a subroutine that can take on the function f(x) as one of its arguments in a video @https://youtu.be/E7T7Xwl_Z7U.