Positional Parameters
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Positional Parameters
A
positional parameter
is a parameter denoted by one or more
digits, other than the single digit 0. Positional parameters are
assigned from the shell's arguments when it is invoked,
and may be reassigned using the
set
builtin command. Positional parameters may not be assigned to
with assignment statements. The positional parameters are
temporarily replaced when a shell function is executed (see
.SM
FUNCTIONS
below).
When a positional parameter consisting of more than a single
digit is expanded, it must be enclosed in braces (see
.SM
EXPANSION
below).
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