Octave question: Integrating .dat files in functions?

[StudentinCrisis]

My wierd.dat file is this:
9
10
2
3
2
3
2

I want my program to print out the sum of this, so here's my code:
datafile = 'wierd.dat';
dlmread(datafile)

function out = fsum(datafile)
sum = 0;
for i = 1: length(datafile)
sum = sum + datafile(i);
end
out = sum;
end

But for some reason it prints out wierd.dat's exact same list. I don't
understand what to do here.

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