Create app.py

app.py

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+import streamlit as st
+from datetime import datetime, date
+
+# Page config
+st.set_page_config(page_title="Age Calculator", page_icon="📅")
+
+st.title("📅 Age Calculator App")
+st.markdown("Enter your birthdate to calculate your current age in years, months, and days.")
+
+# Input: Date of birth
+birth_date = st.date_input("Select your birthdate", min_value=date(1900, 1, 1), max_value=date.today())
+
+# Button to calculate age
+if st.button("Calculate Age"):
+    today = date.today()
+
+    # Calculate years, months, days
+    years = today.year - birth_date.year
+    months = today.month - birth_date.month
+    days = today.day - birth_date.day
+
+    # Adjust if negative
+    if days < 0:
+        months -= 1
+        days += (date(today.year, today.month, 1) - date(today.year, today.month - 1, 1)).days
+
+    if months < 0:
+        years -= 1
+        months += 12
+
+    # Output
+    st.success(f"🎉 You are **{years} years, {months} months, and {days} days** old.")