Initial data commit

Task/Averages-Arithmetic-mean/TypeScript/averages-arithmetic-mean.ts

@@ -0,0 +1,15 @@
+function mean(numbersArr)
+{
+    let arrLen = numbersArr.length;
+    if (arrLen > 0) {
+        let sum: number = 0;
+        for (let i of numbersArr) {
+            sum += i;
+        }
+        return sum/arrLen;
+    }
+    else return "Not defined";
+}
+
+alert( mean( [1,2,3,4,5] ) );
+alert( mean( [] ) );