feat(curriculum): Add interactive examples to Reduce method lesson (#63402)

curriculum/challenges/english/blocks/lecture-working-with-higher-order-functions-and-callbacks/673362be2f70c21e65bc5459.md

@@ -5,7 +5,7 @@ challengeType: 19
 dashedName: what-is-the-reduce-method-and-how-does-it-work
 ---
 
-# --description--
+# --interactive--
 
 The `reduce` method is a function in JavaScript that allows you to process an array and condense it into a single value. This single value can be a number, a string, an object, or even another array.
 
@@ -17,6 +17,8 @@ The reducer function takes two main parameters: an accumulator and the current v
 
 Let's look at an example to illustrate how `reduce` works:
 
+:::interactive_editor
+
 ```js
 const numbers = [1, 2, 3, 4, 5];
 const sum = numbers.reduce(
@@ -27,6 +29,8 @@ const sum = numbers.reduce(
 console.log(sum); // 15
 ```
 
+:::
+
 In this example, we're using `reduce` to get the sum of all the numbers in the array.
 
 The reducer function takes the accumulator (which starts at `0`, as specified by the second argument to `reduce`) and adds each number to it.