Averages/Arithmetic mean: Difference between revisions

=={{header|Cobra}}==

<lang cobra>

class Rosetta

def mean(ns as List<of number>) as number

if ns.count == 0

return 0

else

sum = 0.0

for n in ns

sum += n

return sum / ns.count

def main

print "mean of [[]] is [.mean(List<of number>())]"

print "mean of [[1,2,3,4]] is [.mean([1.0,2.0,3.0,4.0])]"

</lang>

Output:

<pre>

mean of [] is 0

mean of [1, 2, 3, 4] is 2.5

</pre>