#!/usr/bin/env python
# coding: utf-8

# <img src="http://files.oproject.org/img/HeaderOpenData.png">
# # Python Basics
# ## Printing Hello World

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print("Python attack")


# ## Using Python as a Calculator

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7*2


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8-2


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2^2


# ## Print a List of Words with a Loop

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words=["hello","cruel","world"]

for word in words:
    print(word)


# ## Create Your Own Function

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def strange(x):
    i=0
    n=x
    for i<x:
        i=i+1
        
    return (x-i)**n


# ## Use Your Function

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print(strange(3))


# ## Import Useful Modules

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from math import pi


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print(pi)


# ## Exercise: Import sine (sin) Function from math Library and use it to compute sin($\pi$/2)

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from math import sin
from math import pi
from math import factorial

print factorial(4)
print sin(pi/2)


# ## Same but Using Dot Notation

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import math


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math.pi


# ## More About Dot Notation
# ### Fido is a DOG. 
# ### He eats, runs and plays.

# Fido.eats() <BR> <BR>
# Fido.runs() <BR> <BR>
# Fido.plays() <BR> <BR>

# ## Exercise: Please use dot notation with sine (sin) function from the math library to compute sin(pi/2)

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math.sin(pi/2)


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math.factorial(7)


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