            >>> import math
            >>> print(f'The value of pi is approximately {math.pi:.3f}.')
            The value of pi is approximately 3.142.
            >>> table = {'Sjoerd': 4127, 'Jack': 4098, 'Dcab': 7678}
            >>> for name, phone in table.items():
            ...     print(f'{name:10} ==> {phone:10d}')
            ...
            Sjoerd     ==>       4127
            Jack       ==>       4098
            Dcab       ==>       7678
