Pull Request TheAlgorithms#1 for Hacktoberfest

Author: Ricardomonrreal

Python Menu.py

@@ -0,0 +1,83 @@
+def add():
+    num1 = float(input("Enter a number: "))
+    num2 = float(input("Enter a second number: "))
+    res = num1 + num2
+    print("The result is:", res)
+
+def subtract():
+    num1 = float(input("Enter a number: "))
+    num2 = float(input("Enter a second number: "))
+    res = num1 - num2
+    print("The result is:", res)
+
+def multi():
+    num1 = float(input("Enter a number: "))
+    num2 = float(input("Enter a second number: "))
+    res = num1 * num2
+    print("The result is:", res)
+
+def divide():
+    num1 = float(input("Enter a number: "))
+    num2 = float(input("Enter a second number: "))
+    res = num1 / num2
+    print("The result is:", res)
+
+def decbin():
+    decimal = float(input("Enter a number: "))
+    binario = ""
+    cociente = int(decimal)
+    while cociente != 1 :
+        residuo =  cociente % 2
+        cociente = cociente // 2
+        binario = binario + str(residuo)
+
+    binario = binario + str(residuo)
+    res = binario [::-1]
+
+    print(res)
+
+def bindec():
+    binario = input("Enter a binary number: ")
+    decimal = 0
+    longitud = len(binario)
+    contador = 0
+    binario_rev = binario[::-1]
+    while contador < longitud:
+        if binario_rev[contador] == "1":
+            decimal += 2**contador
+        contador +=1
+    
+    print( decimal)
+
+def exit():
+    print("See you!")
+    sys.exit()
+
+while True:
+    print("Option Menu")
+    print("1. Convert from binary to decimal")
+    print("2. Convert from decimal to binary")
+    print("3. Multiply two numbers")
+    print("4. Divide two numbers")
+    print("5. Add two numbers")
+    print("6. Subtract two numbers")
+    print("7. Exit")
+    
+    opcion = input("Enter your option: ")
+    
+    if opcion == "1":
+        bindec()
+    elif opcion == "2":
+        decbin()
+    elif opcion == "3":
+        multi()
+    elif opcion == "4":
+        divide()
+    elif opcion == "5":
+        add()
+    elif opcion == "6":
+        subtract()
+    elif opcion == "7":
+        exit()
+    else:
+        print("Invalid Option")