completed the 1-key-errors of sprint-2

Author: fayaz551

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

@@ -4,10 +4,18 @@
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
+/* function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
+  */
 
 // =============> write your explanation here
+// The error is occurring because we are trying to declare a variable with the same name as the function parameter 'str'. This causes a conflict and results in a SyntaxError. To fix this, we can simply remove the 'let' keyword and assign the new value to 'str' directly, since 'str' is already defined as a parameter.
+
+
 // =============> write your new code here
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}

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

@@ -2,19 +2,27 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+// An error will occur because we are trying to declare a variable with the same name as a function parameter. In this case, we are declaring 'decimalNumber' inside the function, which conflicts with the parameter 'decimalNumber'. This will result in a SyntaxError because we cannot have two variables with the same name in the same scope.
 
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
+/*function convertToPercentage(decimalNumber) {
   const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
 console.log(decimalNumber);
+*/
 
 // =============> write your explanation here
+// The error is occurring because we are trying to declare a variable with the same name as a function parameter. In this case, we are declaring 'decimalNumber' inside the function, which conflicts with the parameter 'decimalNumber'. This will result in a SyntaxError because we cannot have two variables with the same name in the same scope.
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`; 
+  return percentage;
+}

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
+// An error will occur because the function is defined with an invalid parameter name '3'. In JavaScript, parameter names must be valid identifiers, which cannot start with a number. This will result in a SyntaxError when the code is parsed.
 
-function square(3) {
+/* function square(3) {
     return num * num;
 }
+    */
 
 // =============> write the error message here
+// SyntaxError: Unexpected number '3'. Parameter names must be valid identifiers and cannot start with a number.
 
 // =============> explain this error message here
+// The error message indicates that the number '3' is unexpected in the context of a parameter name. In JavaScript, parameter names must be valid identifiers, which means they cannot start with a number. To fix this error, we need to change the parameter name to a valid identifier, such as 'num'.
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
+function square(num) {
+    return num * num;
+}
+console.log(square(5));