Fix 2.js: declare cityOfBirth before usage, add explanation

Author: lamlakamana-oss

Sprint-2/2-mandatory-errors/2.js

@@ -1,5 +1,11 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
 
-console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);
+
+// Error:** `ReferenceError: Cannot access 'cityOfBirth' before initialization (at 2.js:4:30)`
+
+// Cause:** Line 4 is trying to use `cityOfBirth` before the variable has been created. The variable is only declared on line 5, and JavaScript processes the code from top to bottom.
+
+// Fix:** Declare and assign `cityOfBirth` before using it in the code.