Expression statements are used (mostly interactively) to compute and
write a value, or (usually) to call a procedure (a function that
returns no meaningful result; in Python, procedures return the value
None). Other uses of expression statements are allowed and
occasionally useful. The syntax for an expression statement is:
An expression statement evaluates the expression list (which may be a single expression).
In interactive mode, if the value is not
None, it is converted
to a string using the built-in repr()function and the resulting string is written to standard output (see
section 6.6) on a line by itself. (Expression statements
None are not written, so that procedure calls do not
cause any output.)
See About this document... for information on suggesting changes.