I have a file which contains several thousand numbers, each on its own line:
34
42
11
6
2
99
...
I'm looking to write a script which will print the sum of all numbers in the file. I've got a solution, but it's not very efficient. (It takes several minutes to run.) I'm looking for a more efficient solution. Any suggestions?
Here's another one-liner
( echo 0 ; sed 's/$/ +/' foo ; echo p ) | dc
This assumes the numbers are integers. If you need decimals, try
( echo 0 2k ; sed 's/$/ +/' foo ; echo p ) | dc
Adjust 2 to the number of decimals needed.
I don't know if you can get a lot better than this, considering you need to read through the whole file.
$sum = 0;
while(<>){
$sum += $_;
}
print $sum;
Here's another:
open(FIL, "a.txt");
my $sum = 0;
foreach( <FIL> ) {chomp; $sum += $_;}
close(FIL);
print "Sum = $sum\n";