CODEWITHSUNDEEP
pythontypeerrorcurrency
papara
papara

Reputation: 25

Currency convertor using two functions

I am trying to make a currency convertor using two functions in one program but for some reason my program either gets this error: 

line 23, in Input1
    print(amount+"Won equals to "+totalamount+" USD")
TypeError: unsupported operand type(s) for +: 'float' and 'str'

Or does not print anything after putting the 'Option' and 'Amount'. This is my program: 

print("Please choose which currency you want to convert:")
print("A - Korean Won to US Dollar (Exchange Rate: 0.000905)")
print("B - Korean Won to Euro (Exchange Rate: 0.000807350908)")
print("C - Korean Won to Japanese Yen (Exchange Rate: 0.0919061643)")
print("D - Korean Won to Chinese RMB (Exchange Rate: 0.00603703605)")
print("E - Quit")

usd = 0.000905
eur = 0.000807350908
yen = 0.0919061643
rmb = 0.00603703605

def main():
    option =input("Enter your option: ")
    if option== "E":
        exit()
    amount =float(input("Enter the amoutn in Korean Won: "))
    Input1(option, amount)

def Input1(option,amount):
    if option == "A":
        totalamount = (amount * usd)
        print(amount+"Won equals to "+totalamount+" USD")
    elif option== "B":
        totalamount = (amount * eur)
        print (amount+"Won equals to "+totalamount+" Euro")
    elif option== "C":
        totalamount = (amount * yen)
        print (amount+"Won equals to "+totalamount+" Yen")
    elif option== "D":
        totalamount = (amount * rmb)
        print (amount+"Won equals to "+totalamount+" Chinese RMB")
    else:
            print("You entered an invalid input.")
    return option,amount

main()

Can you guys give me tips to fix my program? I am still learning python and any help would be greatly appreciated. Thank you so much!

Upvotes: 0

Views: 378

Answers (3)

Ritik Kumar
Ritik Kumar

Reputation: 701

You just need to typecast amount and totalamount variable that is currently float into string 

print(str(amount)+"Won equals to "+str(totalamount)+" USD")

Or use you use format function 

print("{} Won equals to {} USD ".format(amount, totalamount))

And i think format function is better option

Upvotes: 3

Samwise
Samwise

Reputation: 71522

Use an f-string instead of string concatenation; it'll handle the conversion for you!

print(f"{amount} won equals to {totalamount} USD")

If you did want to do the conversion yourself, it'd look like this:

print(str(amount) + "Won equals to " + str(totalamount) + " USD")

(edit) to answer the question asked in comments, change your main() function to:

def main():
    while True:
        option = input("Enter your option: ")
        if option== "E":
            break
        amount = float(input("Enter the amount in Korean Won: "))
        Input1(option, amount)

Upvotes: 0

KDD2020
KDD2020

Reputation: 49

You have to convert amount and totalamount to a string before using it in print() as string with +. You could use the str() method.

print(str(amount)+"Won equals to "+str(totalamount)+" USD")

Upvotes: 0

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