$ perl -e '$sum += $_ for ( 1..1000000 );print $sum'
500000500000

[download]

Update: Whoops! :) Here's a brute force solution:

$ perl -e 'for(1..1_000_000){$sum+=$_ for(split//)};print $sum'
27000001

[download]

Cheers,
Ovid

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In reply to (Ovid) Re: Finding sum of all digits from 1 to 1 million. by Ovid
in thread Finding sum of all digits from 1 to 1 million. by vladb

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