Dot product: Difference between revisions
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{{out}}
<pre>3</pre>
=={{header|Vlang}}==
<lang vlang>fn dot(x []int, y []int) ?int {
if x.len != y.len {
return error("incompatible lengths")
}
mut r := 0
for i, xi in x {
r += xi * y[i]
}
return r
}
fn main() {
d := dot([1, 3, -5], [4, -2, -1])?
println(d)
}</lang>
{{out}}
<pre>
3
</pre>
=={{header|Wart}}==
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