Key error done

The codes are fixed, the error has been corrected and explained

Author: saff-coder

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

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> This code will give an error message
 
 // 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;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> it gave an error because the variable str is being declared twice one with the function and another one with anew variable 
+// =============> this can be fixed by changing the variable name inside the function
+function capitalise(str) {
+  let capitalised = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return capitalised;
+}
+console.log(capitalise("sophia")); // Output: "Sophia"

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

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> I can see that the variable decimalNumber is being declared twice once as a  function parameter and again as a constant 
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +14,18 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============> so the function is to convert a decimal number into a percentage
+// so if the number is 0.5 it is multiplied by 100
+//  % sign is added at the end to make it 50%
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> the problem can be fixed by removing the redeclaration of the variable decimalNumber inside the function
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+
+// Call the function and store the result in a variable
+const result = convertToPercentage(0.5);
+console.log(result); 
+

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

@@ -3,18 +3,29 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> First there is a number inside the function which is not allowed in JavaScript it should be a variable name
+//the second mistake is num is not declared
 
 function square(3) {
     return num * num;
 }
 
-// =============> write the error message here
+// =============> Uncaught SyntaxError: Unexpected number
+// =============> we put a number (3)where JavaScript expected a variable name 
+//Uncaught SyntaxError: Illegal return statement
 
-// =============> explain this error message here
+//we cant use return inside the function without declaring the function properly
 
 // Finally, correct the code to fix the problem
 
-// =============> write your new code here
+
+// =============> 
+function square(num) {
+  return num * num;
+}
+console.log(square(3));  // the answer should be 9
+console.log(square(5));  // the answer should be 25
+console.log(square(10)); // the answer should be 100
+