CalcPRO+.py

print("Welcome to the PRO version of Calculator+! This calculator\nhas the ability to add, subtract, multiply,\ndivide. Remember that multiple numbers are not compatible with division. This calculator is only compatible with four numbers.")
num1 = float(input("First Number?"))
op = input("Enter operator, ex. +, -, *, /:")
num2 = float(input("Second Number?"))
num3 = float(0)
num4 = float(0)
neednum1 = ()
neednum = input("Do you need another number? yes or no for our server is case sensitive. :)")
if neednum == "yes":
    num3 = float(input("Third Number?"))
    neednum1 = input("Do you need another number? yes or no for our server is case sensitive. :)")
elif neednum == "no":
    print()

if neednum1 == "yes":
    num4 = float(input("Fourth Number?"))
elif neednum == "no":
    print()



if op == "+":
    print(num2 + num1 + num3 + num4)
elif op == "-":
    print(num1 - num2 + num3 - num4)
elif op == "*":
    print(num2 * num1 * num4 * num3)
elif op == "/":
    print(num1 / num2)
else:
    print("You have entered an incorrect character.")
    print("To restart, you will need to re-run your calculator.")
    exit()