Add some debugging excercises

debugging/calculateSum.js

+function calculateSum(numbers) {
+    let sum = 0;
+    
+    for (let i = 0; i <= numbers.length; i++) {
+      sum += numbers[i];
+    }
+    
+    return sum;
+  }
+  
+  const myNumbers = [10, 20, 30, 40, 50];
+  const result = calculateSum(myNumbers);
+  console.log("The sum is:", result);
\ No newline at end of file

debugging/recipe.js

+function brewPotion(ingredient1, ingredient2) {
+    // Ensure both ingredients are provided
+    if (!ingredient1 || !ingredient2) {
+        throw new Error("Both ingredients are required.");
+    }
+    
+    // Combine the ingredients with a dash and capitalize them correctly
+    return ingredient1 + ingredient2
+}
+
+console.log(brewPotion("apple"))
\ No newline at end of file

debugging/username.js

+function greetUser(name) {
+    let greeting = "Hello, " + name + "!";
+    console.log(greeting);
+  }
+  
+  const userName = "Alice";
+  greetUser(username);
\ No newline at end of file