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    \$\begingroup\$ "Explanation coming soon™" That'd be my new catchphrase if it weren't trademarked... \$\endgroup\$ Commented Mar 23, 2017 at 20:55
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    \$\begingroup\$ In the language of awk, your answer is actually only 19 bytes: {s+=$1}END{print s} :) \$\endgroup\$ Commented Mar 25, 2017 at 1:39