index.js

+// index.js
+function displayMessage() {
+    return new Promise((resolve, reject) => {
+        setTimeout(() => {
+            resolve("Hello from the promise!");
+        }, 1000);
+    });
+}
+
+displayMessage()
+    .then(msg => console.log(msg))
+    .catch(err => console.error(err));
+const fs = require('fs').promises;
+
+async function createFile() {
+    try {
+        await fs.writeFile('output.txt', 'This file was created using fs and async/await!');
+        console.log('File created successfully!');
+    } catch (error) {
+        console.error('Error writing file:', error);
+    }
+}
+
+// Call both functions
+async function main() {
+    const message = await displayMessage();
+    console.log(message);
+
+    await createFile();
+}
+
+main();

package.json

+{
+  "name": "promise-fs-demo",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}