A variable name is a series of alphanumeric characters; the first must be a letter. Names are case-sensitive.
Variables do not need to be declared. A variable is automatically allocated when a value is assigned to it.
>>> x = 6 >>> print x * 9 54 >>> stringVariable27 = 'A string' >>> print stringVariable27 A string >>> y = x + stringVariable27 Traceback (most recent call last): File "", line 1, in ? TypeError: unsupported operand types for +: 'int' and 'str'