print 'Hello World'
print '\n'
# if you want to print to multiple lines,
print 'Hello', '\n', 'World'

a = 10
print 'the value of a is', a
print '\n'
# if you want to specify the
# data type to be used
#print 'the value of a is %(f)', a

print 'the value of 1/2 is', 1/2
print 'n'
print 'the value of 1/2 is', 1./2

import numpy as np

import matplotlib.pyplot as plt
plt.plot()



import sys
import numpy
import scipy
#import numpy as np
import matplotlib
#import matplotlib.pyplot as plt
import IPython
# similar to
# #include <stdlib.h> in c
print 'the version of python we are using is',(sys.version)
print 'the version of numpy is ', numpy.version.version, '\n',\
        'the version of scipy is', scipy.version.version, '\n',\
        'the version of matplotlib is ', matplotlib.__version__
print 'the version of IPython being used is', IPython.__version__

print 'hello world'
# it's that simple

var = 4
print 'var =', var
# inorder to print var

temp = 0
for i in range(10):
    temp += 1
print 'sum of first ten integers = ', temp
# note that in python, the loop starts from 0 and ends at n-1
# in the above mentioned case, the loop goes from 0 to 9!

# operations involving arrays can make use of len(array)
array = [1,2,3,4]
for i in xrange(len(array)):
    print array[i]

import matplotlib.pyplot as plt
# as mentioned above,
# library.module.submodule.fuction(arg1, arg2)
# is the way in which we can access the various functions in python libraries
# in this case, the plotting feature is in matplotlib.pyplot
# and instead of having to write matplotlib.pyplot everytime
# we refer to it using plt instead
%matplotlib inline
# is why i love ipython-notebooks
# we can embed plots between the code!#

plt.plot(array,'o')
# plt.show()
# if you're not working on ipython,
# you will have to run plt.show()
# to display the plot

print numpy.array(['foo','bar',1,2,3]), ['foo','bar',1,2,3]