age = 25
name = 'Swaroop'
print('{0} is {1} years old'.format(name, age))
print('Why is {0} playing with that python?'.format(name))
print('{0:.3}'.format(1/3))
print('{0:_^11}'.format('hello'))
print('{name} wrote {book}'.format(name='Swaroop', book='A Byte of Python'))