#1="Elsa"
print "Ex4.py"
import numpy as np
my_name="Earth"
radius=6378
circumference=radius*2*np.pi
my_title="circumference"
print "%s 's %s is %f."%(my_name,my_title,circumference)
print 
x="I like you."
y="You like me."
print x+y
print x*2
print y*3
print 
a1="g"
a2="o"
a3="o"
a4="d"
print a1,a2,a3,a4
print a1+a2+a3+a4
print 
print "I am 5'8\" tall."
print "list:\n\t*cat food\n\t*fish food\n\t*cup cake\n"
