Add Array Left Rotation (#2869)

src/main/java/com/thealgorithms/others/ArrayLeftRotation.java

@@ -0,0 +1,33 @@
+package com.thealgorithms.others;
+
+/*
+ * A left rotation operation on an array
+ * shifts each of the array's elements
+ * given integer n unit to the left.
+ * 
+ * @author sangin-lee 
+ */
+
+public class ArrayLeftRotation {
+
+	/*
+	 * Returns the result of left rotation of given array arr and integer n
+	 * 
+	 * @param arr : int[] given array
+	 * 
+	 * @param n : int given integer
+	 * 
+	 * @return : int[] result of left rotation
+	 */
+	public static int[] rotateLeft(int[] arr, int n) {
+		int size = arr.length;
+		int[] dst = new int[size];
+		n = n % size;
+		for(int i = 0; i < size; i++) {
+			dst[i] = arr[n];
+			n = (n + 1) % size;
+		}
+		return dst;
+	}
+
+}