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DAA1.py

@@ -0,0 +1,53 @@
+def fibonacci_recursive_series(n):
+    series = []
+    def fib_recursive(num):
+        if num <= 0:
+            return 0
+        elif num == 1:
+            return 1
+        else:
+            return fib_recursive(num - 1) + fib_recursive(num - 2)
+    for i in range(n + 1):
+        series.append(fib_recursive(i))
+    print(f"Recursive Fibonacci Series up to {n}:")
+    print(series)
+
+def fibonacci_iterative_series(n):
+    series = []
+    if n >= 0:
+        series.append(0)
+    if n >= 1:
+        series.append(1)
+    a, b = 0, 1
+    for _ in range(2, n + 1):
+        a, b = b, a + b
+        series.append(b)
+    print(f"Iterative Fibonacci Series up to {n}:")
+    print(series)
+
+
+# Menu-driven program
+def menu():
+    while True:
+        print("\n=== Fibonacci Calculator ===")
+        print("1. Recursive Fibonacci Series")
+        print("2. Iterative Fibonacci Series")
+        print("3. Exit")
+
+        choice = input("Enter your choice (1-3): ")
+
+        if choice == '1':
+            n = int(input("Enter the value of n: "))
+            fibonacci_recursive_series(n)
+        elif choice == '2':
+            n = int(input("Enter the value of n: "))
+            fibonacci_iterative_series(n)
+        elif choice == '3':
+            print("Exiting program...")
+            sys.exit()
+        else:
+            print("Invalid choice! Please enter 1, 2, or 3.")
+
+
+# Run the menu
+menu()