Magnanimous numbers: Difference between revisions

</pre>

=={{header|Swift}}==

{{trans|Rust}}

<lang swift>func isPrime(_ n: Int) -> Bool {

if n < 2 {

return false

}

if n % 2 == 0 {

return n == 2

}

if n % 3 == 0 {

return n == 3

}

var p = 5

while p * p <= n {

if n % p == 0 {

return false

}

p += 2

if n % p == 0 {

return false

}

p += 4

}

return true

}

func isMagnanimous(_ n: Int) -> Bool {

var p = 10;

while n >= p {

if !isPrime(n % p + n / p) {

return false

}

p *= 10

}

return true

}

func pad(string: String, width: Int) -> String {

if string.count >= width {

return string

}

return String(repeating: " ", count: width - string.count) + string

}

let m = (0...).lazy.filter{isMagnanimous($0)}.prefix(400);

print("First 45 magnanimous numbers:");

for (i, n) in m.prefix(45).enumerated() {

if i > 0 && i % 15 == 0 {

print()

}

print(pad(string: String(n), width: 3), terminator: " ")

}

print("\n\n241st through 250th magnanimous numbers:");

for n in m.dropFirst(240).prefix(10) {

print(n, terminator: " ")

}

print("\n\n391st through 400th magnanimous numbers:");

for n in m.dropFirst(390) {

print(n, terminator: " ")

}

print()

</lang>

{{out}}

<pre>

First 45 magnanimous numbers:

0 1 2 3 4 5 6 7 8 9 11 12 14 16 20

21 23 25 29 30 32 34 38 41 43 47 49 50 52 56

58 61 65 67 70 74 76 83 85 89 92 94 98 101 110

241st through 250th magnanimous numbers:

17992 19972 20209 20261 20861 22061 22201 22801 22885 24407

391st through 400th magnanimous numbers:

486685 488489 515116 533176 551558 559952 595592 595598 600881 602081