predicted and explained the error and corrected the new code to fix the problem

Author: Pretty Taruvinga

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

@@ -14,7 +14,6 @@ function capitalise(str) {
 // The error occurs because we are trying to declare a new variable 'str' inside the function, which is already declared as a parameter. In JavaScript, you cannot declare a variable with the same name as a parameter within the same scope. To fix this error, we can simply remove the 'let' keyword and assign the new value to the existing parameter 'str' instead of trying to redeclare it.
 
 function capitalise(str) {
-// =============> write your new code here
   str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }

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

@@ -1,20 +1,34 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+
+// I predict that the error is occurring because there is a variable name conflict. 
+// The parameter 'decimalNumber' is being redeclared inside the function, which is not allowed in JavaScript. 
+// This will cause a syntax error because we cannot declare a variable with the same name as a parameter within the same scope.
 
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
+  const decimalNumber = 0.5; 
   const percentage = `${decimalNumber * 100}%`;
-
   return percentage;
 }
 
 console.log(decimalNumber);
 
 // =============> write your explanation here
+// decimalNumber is a parameter of the function convertToPercentage. 
+// Inside the function, we are trying to declare a new variable with the same 
+// name 'decimalNumber' using the 'const' keyword. 
+// This creates a conflict because we cannot have two variables with the same name in the same scope. 
+// To fix this error, we can simply remove the 'const' keyword and assign the 
+// new value to the existing parameter 'decimalNumber' instead of trying to redeclare it.
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));

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

@@ -4,17 +4,25 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+// I predict that error will occur because the parameter 'num' is not defined in the function.
 
 function square(3) {
+
     return num * num;
 }
 
 // =============> write the error message here
-
+// Uncaught SyntaxError: Unexpected number
+// =============> explain this error message here
+// The error occurs because we are trying to use a number '3' as a parameter in the function declaration, which is not valid syntax in JavaScript.
+//  Parameters should be variable names, not literal values. To fix this error, we can replace '3' with a valid variable name like 'num'.
 // =============> explain this error message here
+// To fix this error, we can change the parameter from '3' to a valid variable name like 'num'. This way, we can pass any number as an argument when calling the function, and it will correctly return the square of that number.
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
-
+function square(num) {
+    return num * num;
+}