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argument
<programming> (Or "arg") A value or reference passed to a
function, procedure, subroutine, command or program, by
the caller. For example, in the function
square(x) = x * x
x is the formal argument or "parameter" and in the call
y = square(3+3)
3+3 is the actual argument. This will, in most cases,
execute the function square with x having the value 6.
There are many different conventions for passing arguments to
functions and procedures including call-by-value,
call-by-name, call-by-need. These affect whether the
value of the argument is computed by the caller or the callee
(the function) and whether the callee can modify the value of
the argument as seen by the caller (if it is a variable).
Arguments to functions are usually, following mathematical
notation, written in parentheses after the function name,
separated by commas. Arguments to a program are usually given
after the command name, separated by spaces, e.g.:
cat myfile yourfile hisfile
Here "cat" is the command and "myfile", "yourfile", and
"hisfile" are the arguments.
See also: curried function.
(2002-07-02)
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Nearby terms:
AREV « AREXX « arg « argument » Argus » Ariel » ARI Service
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
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