Data commit

Task/Additive-primes/Kotlin/additive-primes.kotlin

@@ -0,0 +1,31 @@
+fun isPrime(n: Int): Boolean {
+    if (n <= 3) return n > 1
+    if (n % 2 == 0 || n % 3 == 0) return false
+    var i = 5
+    while (i * i <= n) {
+        if (n % i == 0 || n % (i + 2) == 0) return false
+        i += 6
+    }
+    return true
+}
+
+fun digitSum(n: Int): Int {
+    var sum = 0
+    var num = n
+    while (num > 0) {
+        sum += num % 10
+        num /= 10
+    }
+    return sum
+}
+
+fun main() {
+    var additivePrimes = 0
+    for (i in 2 until 500) {
+        if (isPrime(i) and isPrime(digitSum(i))) {
+            additivePrimes++
+            print("$i ")
+        }
+    }
+    println("\nFound $additivePrimes additive primes less than 500")
+}