Introduction to python

Python is an easy to learn and powerful programming language.In python code is automatically compiled to byte code and executed.So python can be used as a scripting language.

Features of python

• Simple and Easy to Learn

• Free and Open Source

• High-level Language

• Built-in high level data types: strings, lists, dictionaries.

• The usual control structures: if, if-else, if-elif-else, while.

• Multiple levels of organizational structure: functions, classes, modules, and packages.

Python programs are executed by interpreters. There are two modes to use the interpreter.

• Interactive mode
• Script mode

Indentation: In python white space indentation effect the meaning.A logical block will have the same indentation.If one of the line of a logical block has a different indentation it will result in syntax error.

Code is checked at runtime: Python does very little checking at compile time.Python only checks a line when it runs that line.