diff --git a/countLanguages.js b/countLanguages.js
index 5ffa781c84..3eec1ab735 100644
--- a/countLanguages.js
+++ b/countLanguages.js
@@ -1,10 +1,26 @@
+/**
+ * A utility class for analyzing programming language usage across GitHub repositories.
+ */
 class CountLanguages {
+    /**
+     * Counts the number of repositories that use each programming language.
+     * 
+     * @param {Array<Object>} repositories - An array of repository objects with a 'language' property
+     * @returns {Object} An object mapping language names to their usage count
+     * @example
+     * // Returns { JavaScript: 3, Python: 2 }
+     * countLanguageUsage([
+     *   { language: 'JavaScript' },
+     *   { language: 'JavaScript' },
+     *   { language: 'Python' },
+     *   { language: 'JavaScript' },
+     *   { language: 'Python' }
+     * ]);
+     */
     countLanguageUsage(repositories) {
         const languageCount = {};
-
         for (const repo of repositories) {
             const language = repo.language;
-
             if (language) {
                 if (languageCount[language]) {
                     languageCount[language]++;
@@ -13,9 +29,7 @@ class CountLanguages {
                 }
             }
         }
-
         return languageCount;
     }
 }
-
 module.exports = CountLanguages;