Merge pull request matthewsamuel95#541 from salapao2136/master

create function is prime language Kotlin

Author: matthewsamuel95

Math/Prime/Kotlin/is_prime.kt

@@ -0,0 +1,23 @@
+package main
+
+fun main(args: Array<String>) {  
+   	var num = 9
+    var isPrime = checkPrimeNumber(num)
+    if (isPrime)
+        println("$num is a prime number.")
+    else
+        println("$num is not a prime number.")
+}
+
+fun checkPrimeNumber(num: Int): Boolean {
+    var flag = true
+    if (num == 1) return false
+    for (i in 2..num / 2) {
+        if (num % i == 0) {
+            flag = false
+            break
+        }
+    }
+
+    return flag
+}