Update app.py

app.py

@@ -1,8 +1,13 @@
 import gradio as gr
+def update(name):
+    return f"Welcome to Gradio, {name}!"
 
-demo = gr.Blocks()
-
-with demo:
-    gr.Markdown("Hi")
+with gr.Blocks() as demo:
+    gr.Markdown("Start typing below and then click **Run** to see the output.")
+    with gr.Row():
+        inp = gr.Textbox(placeholder="What is your name?")
+        out = gr.Textbox()
+    btn = gr.Button("Run")
+    btn.click(fn=update, inputs=inp, outputs=out)
 
 demo.launch()