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Horner's rule for polynomial evaluation: Difference between revisions

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Horner's rule for polynomial evaluation (view source)

Revision as of 21:29, 9 January 2018

84 bytes added ,  6 years ago
→‎{{header|Julia}}
Line 824:
 
=={{header|Julia}}==
{{works with|Julia|0.6}}
 
'''Imperative''':
<lang julia>function horner(coefs, x)
sums = coefcoefs[end]▼
function horner(coef,x)
for k in length(coefs)-1:-1:1
▲ sum = coef[end]
for k s = length(coef)-1:-1:1coefs[k] + x * s
sumend▼
sum = coef[k] + x*sum
return ends
end
▲ sum
 
end</lang>
<lang julia>julia>@show horner([-19, 7, -4, 6], 3)</lang>▼
Output:
 
▲<lang julia>julia> horner([-19,7,-4,6], 3)
{{out}}
128</lang>
<pre>horner([-19, 7, -4, 6], 3) = 128</pre>
 
'''Functional''':
<lang julia>horner2(coefcoefs, x) = foldr((u, v) -> u + x * v, 0, coefcoefs)</lang>
 
Output:
<lang julia>julia>@show horner2([-19, 7, -4, 6], 3)</lang>
 
128</lang>
{{out}}
<pre>horner2([-19, 7, -4, 6], 3) = 128</pre>
 
=={{header|K}}==
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