Update app.py

app.py

@@ -1,4 +1,90 @@
 import streamlit as st
+import math
+
+st.title("Scientific Calculator")
+
+# All operations
+operations = [
+    "+", "-", "*", "/", "^ (power)", "% (modulus)", "// (floor division)",
+    "√ (square root)", "log10", "ln (natural log)", "n! (factorial)",
+    "sin", "cos", "tan", "exp (e^x)"
+]
+
+operation = st.selectbox("Select operation", operations)
+
+# Input fields
+num1 = st.number_input("Enter first number", format="%.4f")
+
+# Only show num2 for operations that need two inputs
+if operation in ["+", "-", "*", "/", "^ (power)", "% (modulus)", "// (floor division)"]:
+    num2 = st.number_input("Enter second number", format="%.4f")
+else:
+    num2 = None
+
+result = None
+error = None
+
+if st.button("Calculate"):
+    try:
+        if operation == "+":
+            result = num1 + num2
+        elif operation == "-":
+            result = num1 - num2
+        elif operation == "*":
+            result = num1 * num2
+        elif operation == "/":
+            if num2 != 0:
+                result = num1 / num2
+            else:
+                error = "Cannot divide by zero"
+        elif operation == "^ (power)":
+            result = num1 ** num2
+        elif operation == "% (modulus)":
+            if num2 != 0:
+                result = num1 % num2
+            else:
+                error = "Cannot perform modulus by zero"
+        elif operation == "// (floor division)":
+            if num2 != 0:
+                result = num1 // num2
+            else:
+                error = "Cannot perform floor division by zero"
+        elif operation == "√ (square root)":
+            if num1 >= 0:
+                result = math.sqrt(num1)
+            else:
+                error = "Cannot take square root of a negative number"
+        elif operation == "log10":
+            if num1 > 0:
+                result = math.log10(num1)
+            else:
+                error = "Log10 undefined for non-positive numbers"
+        elif operation == "ln (natural log)":
+            if num1 > 0:
+                result = math.log(num1)
+            else:
+                error = "Natural log undefined for non-positive numbers"
+        elif operation == "n! (factorial)":
+            if num1 >= 0 and num1 == int(num1):
+                result = math.factorial(int(num1))
+            else:
+                error = "Factorial only defined for non-negative integers"
+        elif operation == "sin":
+            result = math.sin(math.radians(num1))
+        elif operation == "cos":
+            result = math.cos(math.radians(num1))
+        elif operation == "tan":
+            result = math.tan(math.radians(num1))
+        elif operation == "exp (e^x)":
+            result = math.exp(num1)
+    except Exception as e:
+        error = str(e)
+
+    if error:
+        st.error(error)
+    else:
+        st.success(f"Result: {result:.6f}")
+import streamlit as st
 
 st.title("Simple Calculator")