Trying to use Python to create a While statement for a Travel Program - 


#program calculate cost of gas on trip #created sylvia mccoy, march 31, 2015 #created in python #declare variables  trip_destination = 0 number_miles = 0 current_mpg = 0.0 gallon_cost = 0.0 total_gallons = 0.0 total_cost = 0.0  #loop enter destinations  while true:     trip_destination = input("enter travel:  ")     number_miles = float(input("enter how many miles destination:  "))     gallon_cost = float(input("enter how gallon of gas costs:  "))     current_mpg = float(number_miles / gallon_cost)     print("your trip to: " + trip_destination)     print("your total miles: " + number_miles)     print("your mpg:  " + current_mpg)

error in line 20 , 21...stated earlier float, how them print? have work in python. thanks!

you can't use + operator combine string float.

it can used combine 2 of single type (eg.2 strings, 2 floats, etc.)

with said, desired output, can simplify conversions need 1 line, so:

trip_destination = 0 number_miles = 0 current_mpg = 0.0 gallon_cost = 0.0 total_gallons = 0.0 total_cost = 0.0  #loop enter destinations  while true:     trip_destination = input("enter travel:  ")     number_miles = input("enter how many miles destination:  ")     gallon_cost = input("enter how gallon of gas costs:  ")     current_mpg = str(float(number_miles) / float(gallon_cost))     print("your trip to: " + trip_destination)     print("your total miles: " + number_miles)     print("your mpg:  " + current_mpg)

using input() function let value user (already in form of string). way, won't have format/convert later.


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