類型錯誤：不能連接「海峽」和10

Question

print("\n\nThis is a basic program to find the letter grade for a student.") 
student = input("What is the students name? : ") 
test1 = input("What is the first test grade " + student.capitalize() + " recieved? : ") 
test2 = input("What is the second test grade " + student.capitalize() + " recieved? : ") 
test3 = input("What is the third test grade " + student.capitalize() + " recieved? : ") 
averageTest = (int(test1) + int(test2) + int(test3)) 
print(student.capitalize() + " recieved an average test grade of " + ((averageTest)/3)) 

我寫一個基本級的計算器程序並不能解決這個問題

TypeError: cannot concatenate 'str' and 'float' objects

我有這麼多寫和IM上線「浮動」對象卡在這條線上 print(student.capitalize() + " recieved an average test grade of " + ((averageTest)/3))

Answer 1

您不能添加字符串和數字（​​浮點數）。相反，將您的float轉換爲一個字符串，然後再使用另一個字符串進行添加。你可以用

str(x) 

在你的情況下做到這一點，這將是：

# converting the float to a string 
print(student.capitalize() + " recieved an average test grade of " + str((averageTest)/3)) 

# or, to avoid using addition or conversion at all in a console print 
print student.capitalise(), "recieved an average test grade of", averageTest/3 

# or even using string formatting (example is py2.7) 
print '%s recieved an average test grade of %s' % (student.capitalise(), averageTest/3)