6.1 Expression statements
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 yielding None
are not written, so that procedure calls do not cause any output.)
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