In every NodeJS program, there is a magic array named
It contains the command line arguments to the program.
If the user types:
node hello.js Alice Bob
[ '/usr/local/bin/node', '/Users/alex/code/hello.js', 'Alice', 'Bob' ]
ARGV is a historical name. It means "Argument Vector" and has been around since the early 1970s.
Write a new program called
hi.js that contains:
console.log("Hi, " + process.argv)
and run it a few times, e.g.
node hi.js Alice node hi.js Bob
LAB: Hello, Everyone!
hi.js to say hi to every one of its command line arguments.
node hi.js Alice Bob Charlie Hi, Alice! Hi, Bob! Hi, Charlie!
Write a program named
add.js that adds all of its command line arguments together.
node add.js 1 2 3 4 10
Hint: Do you remember how to cleanly convert a string to a number?