Reading input (stdin)

Read what you type in the IDE's Input tab with <STDIN> and chomp.

Runs in Zerethon IDE · Perl 5.40 Official Perl documentation ↗

A run cannot ask questions while it runs. Type the program's input in the Input tab before you press Run; <STDIN> then reads it one line at a time.

main.pl

use v5.40;

chomp(my $name = <STDIN>);
my ($x, $y) = split ' ', <STDIN>;
say "Hello, $name! $x + $y = ", $x + $y;

Input (stdin)

Ada
3 4

Output

Hello, Ada! 3 + 4 = 7

main.pl

use v5.40;

my $total = 0;
while (my $line = <STDIN>) {
    chomp $line;
    next if $line eq "";
    $total += $line;
}
say "total: $total";

Input (stdin)

5
10
15

Output

total: 30

Reading every line of stdin until it ends.

A line read from <STDIN> ends with its newline; chomp removes it.
split ' ', $line splits on any run of whitespace and ignores leading spaces.
At the end of the input <STDIN> returns undef; using it then gives Use of uninitialized value warnings. Add the input in the Input tab.

Official references