if ('foo 123 bar' =~ /(\d+)/) {
    print("$1\n");
}

##</code><code>##

123

##</code><code>##

for (1..2) {
   if ('ab' =~ /a/g) {
       print("match\n");
   } else {
       print("no match\n");
   }
}

##</code><code>##

match
no match

##</code><code>##

for (1..2) {
   if ('ab' =~ /a/) {
       print("match\n");
   } else {
       print("no match\n");
   }
}

##</code><code>##

match
match