Why are tuning pegs (aka machine heads) different on different types of guitars? Download source code from our GitHub repo. This python program allows a user to enter any character. Check if a Number is Positive, Negative or 0. In this tutorial, you will learn a simple Python 3 program to check if a number is positive or negative. Given a number. Cholesky decomposition is an efficient method for inversion of symmetric positive-definite matrices. and want to use the meanfield inference method of HMM model. Examples: Input: 5 Output: Positive Input: -5 Output: Negative Approach: We will use the if-elif statements in Python.