Bot

# Ask user for name and greet them.
print("Hello, World!")
users_name = input("Name: ")
print("Hello, " + users_name + ".")

# Ask user to input command to add or subtract.
command = input("operation?")

# Get two integers from user and add.
if command == "add" or command == "addition":
  num1 = input("Number 1: ")
  n1 = int(num1)
  num2 = input("Number 2: ")
  n2 = int(num2)
  result = n1 + n2
  output = str(result)
  print(num1 + " + " + num2 + " = " + output)

# Get two integers from user and subtract.
elif command == "sub" or command == "subtract" or command == "subtraction":
  num1 = input("Number 1: ")
  n1 = int(num1)
  num2 = input("Number 2: ")
  n2 = int(num2)
  result = n1 - n2
  output = str(result)
  print(num1 + " - " + num2 + " = " + output)

# Get two integers from user and multiply.
elif command == "multiply" or command == "multiplication":
  num1 = input("Number 1: ")
  n1 = int(num1)
  num2 = input("Number 2: ")
  n2 = int(num2)
  result = n1 * n2
  output = str(result)
  print(num1 + " * " + num2 + " = " + output)

# Get two integers from user and divide.
elif command == "divide" or command == "division":
  num1 = input("Number 1: ")
  n1 = int(num1)
  num2 = input("Number 2: ")
  n2 = int(num2)
  result = n1 / n2
  output = str(result)
  print(num1 + " / " + num2 + " = " + output)

# Get dimensions and calculate area.
elif command == "Area" or command == "area":
  num1 = input("Length: ")
  n1 = int(num1)
  num2 = input("Width: ")
  n2 = int(num2)
  result = n1 * n2
  output = str(result)
  print(num1 + " * " + num2 + " = " + output)

# Get dimensions from user and calculate volume.
elif command == "Volume" or command == "volume":
  num1 = input("Length: ")
  n1 = int(num1)
  num2 = input("Width: ")
  n2 = int(num2)
  num3 = input("Height: ")
  n3 = int(num3)
  result = n1 * n2 * n3
  output = str(result)
  print(num1 + " * " + num2 + " * " + num3 + " = " + output)

# Calculate average; get a list of numbers and size of list from user, then set total to 0
elif command == "Average" or command == "mean":
  numbers = []
  size = input("Number of items to average:")
  size = int(size)
  total = 0

  #input number from user and add to total
  for item_n in range(size):
    item = input("what is item " + str(item_n) + "?")
    numbers.append(item)
    value = int(item)
    total += value

  #calculate average by dividing total by list size
  average = (total / size)
  mean = str(average)
  print("The average is " + mean)

# Calculalate tip based on price paid and desired percentage
elif command == "tip" or command == "gratuity":
  price = input("Original price:")
  price = int(price)
  percent = input("What percent would you like to tip?")
  percent = (int(percent)/100)
  tip = price * percent
  tip = str(tip)
  print("Tip is " + tip)

# invalid input
else:
  print("I don't understand " + "'" + command + "'")