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Be useful.
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var
_x: String;
begin
_x := ParamString(1);
end.x will be an empty string if no commandline argument was passed.
void main(int argc, char *argv[])
{
char *x = argv[1];
}argv[0] would be the program name. See §5.1.2.2.1 Program startup in linked doc n1570.pdf .
int main(int argc, char *argv[])
{
vector<string> args(1 + argv, argc + argv);
string x = args.at(0);
}Notice that this version checks for errors (and throws if args[0] does not exist).
static void Main(string[] args)
{
string x = args[0];
}auto x = args[1];main(args) {
var x = args[0];
}Command line arguments are only available as argument to main.
character(len=:), allocatable :: x
integer :: n
call get_command_argument (1, length=n)
allocate (character(n):: x)
call get_command_argument (1, x)
x <- return.head =<< System.Environment.getArgs
const x = process.argv[2]This only works on nodeJS because browsers aren't a command line.
process.argv[0] is the filepath you're at.
process.argv[1] is `node` (the command used to run the program).
process.argv[0] is the filepath you're at.
process.argv[1] is `node` (the command used to run the program).
public static void main(String[] args) {
if (args.length != 0) {
String x = args[0];
}
}In most JVM implementations, the `args` parameter will be non-null.
String x = args[0];This works only in method main(String[] args) .
x = arg[1]$x = $argv[1];$x = $ARGV[0];x = ARGV.firstlet x = env::args().nth(1).unwrap_or("".to_string());We get the 1st element using the nth method and we fallback to an empty string if no arg was found.
let first_arg = env::args().skip(1).next();
let fallback = "".to_owned();
let x = first_arg.unwrap_or(fallback);The first CLI argument may not be present. We fall back to an empty string.