MPLEMENTATION OF BASIC PYTHON PROGRAM

Ex. No. :2

IMPLEMENTATION OF BASIC PYTHON PROGRAM

Python is a remarkably powerful dynamic programming language that is used in a wide variety of application domains. Python is often compared to Tcl, Perl, Ruby, Scheme or Java. Some of its key distinguishing features include:

• very clear, readable syntax
• strong introspection capabilities
• intuitive object orientation
• natural expression of procedural code
• full modularity, supporting hierarchical packages
• exception-based error handling
• very high level dynamic data types
• extensive standard libraries and third party modules for virtually every task
• extensions and modules easily written in C, C++ (or Java for Jython, or .NET languages for IronPython)

INDENTATION

Python functions have no explicit begin or end, and no curly braces to mark where the function code starts and stops.

The only delimiter is a colon (:) and the indentation of the code itself.

"Whitespace is significant in Python source code."

No, not in general. Only the indentation level of your statements is significant

Everywhere else, whitespace is not significant and can be used as you like, just like in any other language

Celsius to Farenheit

Convert temperature specified in celsius to farenheit, using Python's interactive prompt.

>>> celsius = 100

>>> farenheit = (9 * celsius / 5) + 32

>>> print farenheit

212

>>> 

Strings and slicing

>>> word = "newsworthy"

>>> print len(word)

10

>>> print word[1]

e

>>> print word[0:4]

news

>>> print word[4:10]

worthy

>>> 

Writing Python scripts

Write a python script to print "Hello World".

1. Create a file with the following statement.

print "Hello World"

2. Save the script as hello.py. Invoke the python interpreter with hello.py as argument.

$ python hello.py

Hello World

Python script to find the first factorial that has more than 100 digits.

n = 1

fact = 1

while fact < (10 ** 100):

n = n + 1

fact = fact * n

Write a Python script that prints prime numbers less than 20.

for n in range(2, 10):

for x in range(2, n):

if n % x == 0:

print n, 'equals', x, '*', n/x

break

else:

print n, 'is a prime number'

Fibonacci series

Fibo.py

# Fibonacci numbers module

def fib(n): # write Fibonacci series up to n

a, b = 0, 1

while b < n:

print b,

a, b = b, a+b

def fib2(n): # return Fibonacci series up to n

result = []

a, b = 0, 1

while b < n:

result.append(b)

a, b = b, a+b

return result

>>> import fibo

>>> fibo.fib(1000)

1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987

>>> print fibo.__name__

fibo

>>> myfib = fibo.fib

>>> myfib(500)

1 1 2 3 5 8 13 21 34 55 89 144 233 377

>>> from fibo import fib

>>> fib(500)

1 1 2 3 5 8 13 21 34 55 89 144 233 377

>>> 

RESULT:Thus basic python program was implemented.

--

Don't ever give up.

Even when it seems impossible,

Something will always

pull you through.

The hardest times get even

worse when you lose hope.

As long as you believe you can do it, You can.

But When you give up,

You lose !

I DONT GIVE UP.....!!!

with regards

prem sasi kumar arivukalanjiam