Python Program to Print Hello world

PythonServer Side ProgrammingProgramming

Let us try to execute Python “Hello World” programs in different modes of Python programming.

Interactive Mode Programming

Example

Invoking the interpreter without passing a script file as a parameter brings up the following prompt −

$ python
Python 2.4.3 (#1, Nov 11 2010, 13:34:43)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-48)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>

Output

Type the following text at the Python prompt and press the Enter −

>>> print "Hello, Python!"

Example

If you are running new version of Python, then you would need to use print statement with parenthesis as in print ("Hello, Python!");. However in Python version 2.4.3, this produces the following result −

Hello, Python!

Script Mode Programming

Invoking the interpreter with a script parameter begins execution of the script and continues until the script is finished. When the script is finished, the interpreter is no longer active.

Example

Let us write a simple Python program in a script. Python files have extension .py. Type the following source code in a test.py file −

 Live Demo

print "Hello, Python!"

We assume that you have Python interpreter set in PATH variable. Now, try to run this program as follows −

$ python test.py

Output

This produces the following result −

Hello, Python!

Example

Let us try another way to execute a Python script. Here is the modified test.py file −

 Live Demo

#!/usr/bin/python
print "Hello, Python!"

We assume that you have Python interpreter available in /usr/bin directory. Now, try to run this program as follows −

$ chmod +x test.py # This is to make file executable
$./test.py

Output

This produces the following result −

Hello, Python!
raja
Published on 24-Jan-2020 11:10:23
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