In 1 key-errors, made a preditions, explained the syntax error, and fixed the conflict with a new variable name

Author: TzeMingHo

Sprint-2/1-key-errors/0.js

@@ -1,13 +1,29 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// I guess the function is trying to capitalise the first letter of the string,
+// capture the rest of the string from index 1 to the end of the string,
+// and concatenate them together to return the capitalised string
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
-
+/*
 function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
+*/
 
 // =============> write your explanation here
+// After calling the function capitalise with a string input,
+// I got a syntax error that "str" has already been declared.
+// This is because str has already been declared as a parameter of the function,
+// when a new variable named str, it causes a conflict.
+
 // =============> write your new code here
+// I renamed the new variable to capitalisedStr to avoid the conflict
+
+function capitalise(str) {
+  let capitalisedStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return capitalisedStr;
+}
+console.log(capitalise("hello")); // should return "Hello"