Primes whose sum of digits is 25: Difference between revisions
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done...
</pre>
=={{header|Ruby}}==
<lang ruby>require 'prime'
def digitSum(n)
sum = 0
while n > 0
sum += n % 10
n /= 10
end
return sum
end
for p in Prime.take_while { |p| p < 5000 }
if digitSum(p) == 25 then
print p, " "
end
end</lang>
{{out}}
<pre>997 1699 1789 1879 1987 2689 2797 2887 3499 3697 3769 3877 3967 4597 4759 4957 4993 </pre>
=={{header|Tcl}}==
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