1-Key-errors are done.

Author: B3-Bisrat

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

@@ -1,6 +1,6 @@
 // Predict and explain first...
 //  =============> write your prediction here
-
+// I predict the code will give an error because inside the function we create a variable called str again.
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
@@ -9,5 +9,10 @@ function capitalise(str) {
   return str;
 }
 
+console.log(capitalise("hello"));
 // =============> write your explanation here
+// The error occurs because we are trying to declare a variable named str inside the function, but it is already declared as a parameter. This creates a conflict and results in a syntax error.
 // =============> write your new code here
+function capitalise(str) {
+  return `${str[0].toUpperCase()}${str.slice(1)}`;
+}

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

@@ -2,7 +2,7 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
-
+// console.log(decimalNumber); will cause error because decimalNumber only exists inside the function.
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
@@ -15,6 +15,14 @@ function convertToPercentage(decimalNumber) {
 console.log(decimalNumber);
 
 // =============> write your explanation here
-
+//The error happens because the function already has a parameter called decimalNumber.
+//Creating another variable with the same name inside the function causes a conflict
 // 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 +4,26 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+// it is syntax error. 3 is a value not a variable name.
 
 function square(3) {
     return num * num;
 }
 
 // =============> write the error message here
+//function square(3) {
+                ^
 
+//SyntaxError: Unexpected number
 // =============> explain this error message here
+//The error is as I predicted. The function parameter should be a variable name, not a value. 
+//In this case, 3 is a value and cannot be used as a parameter name.
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
+function square(num) {
+    return num * num;
+}