Currently I have 2 functions, one to check if the elements are in sequence and the other to get only those part of the file that needs to be checked for sequence

1) Cut only the columns of file that needs sequence checking (I have attached file. I wrote the function in Editplus for indentation)
2) to check if the elements are in sequence as below :

Code:

sub is_increasing_array {
    return unless @_;
    return 1 if @_ == 1;

    foreach (1 .. $#_) {
        if ($_[$_] != $_[$_ - 1] + 1)    {
            return ($_[$_] , $_[$_ - 1]);
        }

    return 1;
}

I have to mention that there are two hash maps which are used. one contains the start value from where the sequence validation needs to be performed and other has the name of the files on which validation has to be performed.

In the files the position of the columns on which it has to be performed may change. I have handled that part. I actually needed to know if we can use awk to check for sequence Or a Regex for the same (I did not ask this before)

Please advise

Thanks