Add 238-Product-Of-Array-Except-Self.kt

Author: Sharan Salian

kotlin/238-Product-Of-Array-Except-Self.kt

@@ -0,0 +1,26 @@
+package kotlin
+
+
+fun main() {
+    val nums = intArrayOf(1, 2, 3, 4)
+    //o.p : 24, 12,8,6
+}
+
+fun productExceptSelf(nums: IntArray): IntArray {
+    val res = IntArray(nums.size)
+
+    var prefix = 1
+
+    for (i in 0 until nums.size) {
+        res[i] = prefix
+        prefix *= nums[i]
+    }
+
+    var postfix = 1
+    for (i in nums.size - 1 downTo 0) {
+        res[i] *= postfix
+        postfix *= nums[i]
+    }
+
+    return res
+}