How to remove the error of 'can only concatenate str (not "float") to str' in Py-CodePudding

I am trying to calculate a percentage of landmass occupied by a country from the total landmass.I am taking two arguments as string and float in a function and returning String along with the calculated percentage in it. For example the Input =area_of_country("Russia", 17098242) and Output = "Russia is 11.48% of the total world's landmass". Below is my code

    class Solution(object):

    def landmass(self, st, num):
        percentage = 148940000 / num * 100

        return st   "is"   percentage   "of total world mass!"


if __name__ == "__main__":

    s = "Russia"
    n = 17098242
    print(Solution().landmass(s, n))

Error :-

        return st   "is"   percentage   "of total world mass!"
TypeError: can only concatenate str (not "float") to str

CodePudding user response：

You need to cast the percentage (since it's a float) into a string when concatenating using the operator. So your return statement would look like:

return str(st)   "is"   str(percentage)   "of total world mass!"

CodePudding user response：

instead of this:

return st "is" percentage "of total world mass!"

Try this:

return str(st)   "is"   str(percentage)   "of total world mass!"