Additive primes: Difference between revisions
Additive primes in Dart
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(Additive primes in Dart) |
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</pre>
=={{header|Dart}}==
<syntaxhighlight lang="dart">import 'dart:math';
void main() {
const limit = 500;
print('Additive primes less than $limit :');
int count = 0;
for (int n = 1; n < limit; ++n) {
if (isPrime(digit_sum(n)) && isPrime(n)) {
print(' $n');
++count;
}
}
print('$count additive primes found.');
}
bool isPrime(int n) {
if (n <= 1) return false;
if (n == 2) return true;
for (int i = 2; i <= sqrt(n); ++i) {
if (n % i == 0) return false;
}
return true;
}
int digit_sum(int n) {
int sum = 0;
for (int m = n; m > 0; m ~/= 10) sum += m % 10;
return sum;
}</syntaxhighlight>
=={{header|Delphi}}==
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