Primes whose first and last number is 3: Difference between revisions
Primes whose first and last number is 3 (view source)
Revision as of 09:07, 4 September 2021
, 2 years ago→{{header|jq}}: fancier
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def count(s): reduce s as $x (null; .+1);
# $n is the max number of intervening digits
def task($n):
(range(1; $n+1) as $power
| (3 * pow(10; $power+1) + 3) as $min
| ("3" + ((pow(10; $power) -1)|tostring) + "4"|tonumber) as $max
task(2),
▲ 3,
▲ range(303;394;10),
▲ | select(is_prime)))" ;
{{out}}
<pre>
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