added a new program for fibo series

fibonacci_series/Javascript/fibonacci.js

@@ -1,19 +1,21 @@
+// program to generate fibonacci series up to a certain number
 
-/*codacy does not allow console logging , but there is no other alternative for this since I am not running it on any browser.
-If at all this needs to be passed as 0 issues on codacy , I will need to remove all the console.log() and then there will be simply no 
-output although the function will run all fine.*/
+// take input from the user
+const number = parseInt(prompt("Enter a positive number: "));
+let n1 = 0, n2 = 1, nextTerm;
 
-function fibonacci(n){
-	let n1 = 0 , n2 =1 ,next ;
-	next = n1+n2;
-	console.log("fibonacci series :");
-	console.log(n1);
-	console.log(n2);
-	while (next<n){
-		console.log(next);
-		n1 = n2;
-		n2 = next;
-		next = n1+n2;
-	}
+console.log("Fibonacci Series:");
+console.log(n1); // print 0
+console.log(n2); // print 1
+
+nextTerm = n1 + n2;
+
+while (nextTerm <= number) {
+
+    // print the next term
+    console.log(nextTerm);
+
+    n1 = n2;
+    n2 = nextTerm;
+    nextTerm = n1 + n2;
 }
-fibonacci(15);