Python provides a number of built-in modules and functions for commonly needed programming tasks. For example, to access operating system properties, python provides the module os. You can use the environ object of os module to access operating system environment variables. The object os.environ behaves like a dictionary of environment variable names and its values. […]

Python’s built-in support for lists, strings and data conversion enables us to write very concise code which usually takes much more code in other languages. For example, the following python 3 code computes sum of digits of a number using a generator expression and an implicit iterator. # python3 code number = int(input("Please enter a […]

Formula for computing factorial is, Factorial(n) = n*(n-1)*(n-2)…. *1 This can be written as Factorial(n) = n*Factorial(n-1). Hence we can use recursion to find factorial of a number.The following Python 3 program computes factorial of a number using recursion. # python 3.6+ needed def factorial(n): if n==1 or n==0: return 1 else: return n * […]