Fibonacci Search method

This script provides the final interval of uncertainty in which the minima of single variable non linear/linear function. The function should be unimodal in the interval. The script checks the unimodality of the function.User inputs the initial interval and the number of iterations. depending upon the number of iterations, final interval is obtained. Larger the iterations ,smaller the final interval of uncertainty. The algorithm is based on the fibonaccci series 1 1 2 3 5 8 13....