In Python, String and Unicode objects have one special operator: the % operator. With that operator, strings can be formatted with format codes. Formatting is given syntax format % values, where format is a string with format codes that are replaced with values. When value is any kind of mapping, formats must include parenthesis that contain a key. An item is fetched from directory with key or __getitem__ is overloaded with key. In this example, Eval's __getitem__ returns the result of eval(key).
Python, 10 lines
This solution can be useful because in order to do evaluations inside strings, strings must be constructed from many pieces. An alternative solution:
number = 19 text = "python" print text.capitalize()+" "+str(round(number/9.0,1))+" rules!"