#!/usr/bin/python
# print absolute value of an integer
a = 100
if a >= 0:
    print a
else:
    print -a

# about \
print r'I will print 2 \: \\'

# paragraph
paragraph = '''
... line1
... line2
...line3
'''
print paragraph

a = 'ABC'
b = a
a = 'DEF'
print 'a: ', a
print 'b: ', b
