Hi there, thank you. While treating the output as number so eg: 
#!/usr/bin/perl -w
use strict;

my $resultnow='C:/Users/user/Desktop/solution.dat';

open (FILE, '<', $resultnow) or die "$resultnow File not found : $!";
my @lines = <FILE>;

my $valuenow= $lines[9];

my @items=split' ',$valuenow;



use Data::Dumper;



#print Dumper(@items);
my $val=Dumper("$items[-1]");


my $n= "$val+8";
print $n;

close (FILE);

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here I tryed to make a sum. with "my $n= "$val+8";", so that I can obtain a vlue like -31.9999400000 (instead of '-39.9999400000'+8). But unfortunately that does not work. So how can I solve this problem? (that was the reason why I thought it is a string value).

In reply to Re^3: string to number via data dumper by semipro
in thread string to number via data dumper by semipro

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