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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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28
Task/Loops-Increment-loop-index-within-loop-body/Kotlin/loops-increment-loop-index-within-loop-body-1.kotlin Normal file
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// version 1.2.60
fun isPrime(n: Long): Boolean {
if (n % 2L == 0L) return n == 2L
if (n % 3L == 0L) return n == 3L
var d = 5L
while (d * d <= n) {
if (n % d == 0L) return false
d += 2L
if (n % d == 0L) return false
d += 4L
}
return true
}
fun main(args: Array<String>) {
var i = 42L
var n = 0
do {
if (isPrime(i)) {
n++
System.out.printf("n = %-2d %,19d\n", n, i)
i += i - 1
}
i++
}
while (n < 42)
}

30
Task/Loops-Increment-loop-index-within-loop-body/Kotlin/loops-increment-loop-index-within-loop-body-2.kotlin Normal file
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// version 1.2.60
fun isPrime(n: Long): Boolean {
if (n % 2L == 0L) return n == 2L
if (n % 3L == 0L) return n == 3L
var d = 5L
while (d * d <= n) {
if (n % d == 0L) return false
d += 2L
if (n % d == 0L) return false
d += 4L
}
return true
}
tailrec fun loop(index: Long, numPrimes: Int) {
if (numPrimes == 42) return
var i = index
var n = numPrimes
if (isPrime(i)) {
n++
System.out.printf("n = %-2d %,19d\n", n, i)
loop(2 * i - 1, n)
}
else loop(++i, n)
}
fun main(args: Array<String>) {
loop(42, 0)
}