Clarify the assignment operation in count.js

Author: Monsur0001

Sprint-2/1-key-exercises/1-count.js

@@ -4,3 +4,9 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+
+Line 3 updated the value of the variable "count". The "=" operator is an 
+assignment operator, which takes the value on the right side 
+("count + 1") and assigns it to the variable on the left side 
+("count"). So, it takes the current value of "count", adds 1 to it, and then 
+stores that new value back into "count".