Why do I get can't convert float to str implicitly?

Question

Having some trouble running this. Basically I just want to get an amount and if it's more than 50 free shipping and less than charge 10 extra dollars. I keep on getting an error about converting a float to a str implicity? I thought my input should be considered a float?

#declare flags
shippingCharge = 10
freeShipping = False
#Get number and convert to float?
purchaseAmount = float(input("\nHow much is the purchase amount? "))

if (purchaseAmount) >= 50 : 
    freeShipping = True
    print("Your purchase amount is " + purchaseAmount + "$ and shipping is free!")
else : 
    print("Your purchase amount is " + purchaseAmount + "$ and shipping is " + shippingCharge + "$.")
    purchaseAmount = shippingCharge + purchaseAmount
    print("Your new total is " + purchaseAmount)
print ("Have a nice day and thank you for shopping with us.")

You could have gotten answers to this by literally Googling your question's title. — TigerhawkT3, Jun 09 '15 at 21:35

score 1 · Answer 1 · answered Jun 09 '15 at 21:32

1

The problem is in your print statements:

print("Your purchase amount is " + purchaseAmount + "$ and shipping is free!")

You are concatenating string and floats without conversion, try adding a str() cast to the variable:

i.e:

print("Your purchase amount is " + str(purchaseAmount) + "$ and shipping is free!")

You can also use format:

print("Your purchase amount is {0}$ and shipping is free!".format(purchaseAmount))

answered Jun 09 '15 at 21:32

dfranca

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Awesome thank you for your help! – Aaron Jun 09 '15 at 21:42

score 0 · Answer 2 · answered Jun 09 '15 at 21:34

Because Python is a strongly typed language:

https://wiki.python.org/moin/Why%20is%20Python%20a%20dynamic%20language%20and%20also%20a%20strongly%20typed%20language

You need to convert the type to string explicitly. It will not do it automatically for you intentionally.

score 0 · Answer 3 · answered Jun 09 '15 at 21:35

0

Just replace purchaseAmount with str(purchaseAmount) and you will be fine.

How much is the purchase amount? 50
Your purchase amount is 50.0$ and shipping is free!
Have a nice day and thank you for shopping with us.

answered Jun 09 '15 at 21:35

Alex Ivanov

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score 0 · Answer 4 · answered Jun 09 '15 at 21:37

0

You input is a float and thus it can not be concatenated with strings. You must interpolate the float.

 print('Your purchase amount is ${} and shipping is free!'.format(purchaseAmount))

answered Jun 09 '15 at 21:37

Malik Brahimi

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Why do I get can't convert float to str implicitly?

4 Answers4