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Add an explanation of parameter vs argument

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Carol (Nichols || Goulding) 2017-01-06 17:52:49 -05:00
parent 9c8014cdcd
commit 1e8dae5385
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src/ch03-03-how-functions-work.md
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@ -52,8 +52,16 @@ called and its message is printed.
### Function Parameters
Functions can also have parameters. The following rewritten version of
`another_function` shows what parameters look like in Rust:
Functions can also be defined to have *parameters*, which are special variables
that are part of a function's signature. When a function has parameters, we can
provide it with concrete values for those parameters. Technically, the concrete
values are called *arguments*, but in casual conversation people tend to use
the words "parameter" and "argument" interchangably for either the variables in
a function's definition or the concrete values passed in when you call a
function.
The following rewritten version of `another_function` shows what parameters
look like in Rust:
<span class="filename">Filename: src/main.rs</span>