Create app.py

app.py

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+import streamlit as st
+import math
+
+st.set_page_config(page_title="Advanced Calculator", layout="centered")
+
+st.title("Advanced Calculator App")
+
+# Initialize memory
+if "memory" not in st.session_state:
+    st.session_state.memory = 0.0
+
+# =========================
+# Expression Calculator
+# =========================
+st.subheader("Expression Calculator")
+expression = st.text_input("Enter expression (e.g., 2 + 3 * 4)")
+
+if st.button("Calculate Expression"):
+    try:
+        result = eval(expression)
+        st.success(f"Result: {result}")
+    except:
+        st.error("Invalid expression")
+
+st.divider()
+
+# =========================
+# Standard Calculator
+# =========================
+st.subheader("Standard Operations")
+
+operation = st.selectbox(
+    "Select Operation",
+    [
+        "Add",
+        "Subtract",
+        "Multiply",
+        "Divide",
+        "Power",
+        "Modulus",
+        "Square Root"
+    ],
+)
+
+if operation != "Square Root":
+    num1 = st.number_input("Enter first number", value=0.0)
+    num2 = st.number_input("Enter second number", value=0.0)
+else:
+    num1 = st.number_input("Enter number", value=0.0)
+
+if st.button("Compute"):
+    try:
+        if operation == "Add":
+            result = num1 + num2
+        elif operation == "Subtract":
+            result = num1 - num2
+        elif operation == "Multiply":
+            result = num1 * num2
+        elif operation == "Divide":
+            result = num1 / num2
+        elif operation == "Power":
+            result = num1 ** num2
+        elif operation == "Modulus":
+            result = num1 % num2
+        elif operation == "Square Root":
+            result = math.sqrt(num1)
+
+        st.success(f"Result: {result}")
+
+    except ZeroDivisionError:
+        st.error("Cannot divide by zero")
+    except:
+        st.error("Error in calculation")
+
+st.divider()
+
+# =========================
+# Memory Functions
+# =========================
+st.subheader("Memory Functions")
+
+col1, col2, col3, col4 = st.columns(4)
+
+with col1:
+    if st.button("M+"):
+        st.session_state.memory += num1
+        st.success("Added to memory")
+
+with col2:
+    if st.button("M-"):
+        st.session_state.memory -= num1
+        st.success("Subtracted from memory")
+
+with col3:
+    if st.button("MR"):
+        st.info(f"Memory: {st.session_state.memory}")
+
+with col4:
+    if st.button("MC"):
+        st.session_state.memory = 0.0
+        st.warning("Memory cleared")
+
+st.divider()
+
+st.caption("Built with Streamlit • Deploy on Hugging Face Spaces")