You can do like so:

use warnings;
use strict;

  for my $cmd(qw(ls ipconfig)){
     system("$cmd");
  }
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1. Please, check this How do I post a question effectively?
   
   
2. "..When I run the script below, it only picks the first commands.."
   
Reason and Answer:
"..The "exec" function executes a system command *and never returns*; use "system" instead of "exec" if you want it to return...."
Check also exec and system

3. I used ipconfig instead of the OP ifconfig because I tested this on window OS.