add description

Author: pathywang

Sprint-1/2-mandatory-errors/2.js

@@ -1,5 +1,6 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
+// we should put variable declaration first then print out as JS languages rules, can not write the other way around
 
 const cityOfBirth = "Bolton";
 console.log(`I was born in ${cityOfBirth}`);