Add clearer explanation for random.js

Author: Niangh-Ciang

Sprint-1/1-key-exercises/4-random.js

@@ -14,3 +14,6 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
 console.log(num);
 //I have run it several times and I saw that the number is changing each time.
+/*Each time the program runs, Math.random() generates a new random decimal,
+so 'num' changes on every run. However, it will never go below the minimum
+value (1) or above the maximum value (100). The bounds are 1 and 100.*/