I have some files in a directory as mentioned below

CSEK.1.ABC19_KLJK_TT1.dat

CSEK.1.ABC19_AB_TT1.dat

Check_1.ABC19.dat.gz

CSEK.1.ABC19.dat

if ($file =~ m/^Check/)
{
print " File - 1 :=$file\n";
}
elsif ($file =~ m/^CSEK.*TT1.dat$/)
{
print "File - 2 :=$file\n";
}
elsif ($file =~ m/^CSEK.dat$/)
{
print "File - 3 :=$file\n";
}
[download]

output

File - 1 := Check_1.ABC19.dat.gz
File - 2 :=
File - 3 := CSEK.1.ABC19_KLJK_TT1.dat
        CSEK.1.ABC19_AB_TT1.dat
        CSEK.1.ABC19.dat
[download]

How can i place more check before i read a file

I am expecting the output as below:

File - 1 := Check_1.ABC19.dat.gz
File - 2 := CSEK.1.ABC19_KLJK_TT1.dat
        CSEK.1.ABC19_AB_TT1.dat
File - 3 := CSEK.1.ABC19.dat
[download]

Update

I did the below and now i am getting the answer

if ($file =~ m/^Check/)
{
print " File - 1 :=$file\n";
}
elsif ($file =~ m/^CSEK|TT1.dat$/)
{
print "File - 2 :=$file\n";
}
elsif ($file =~ m/^CSEK.dat$/)
{
print "File - 3 :=$file\n";
}
[download]

output