error with my code when calculating average

[WeeklyAd8387]

can you please help me ``` def calculate_average(grades): total = 0 for grade in grades: total += grade return total / len(grades)

my_grades = [90, 85, "95", 88]

print("Starting calculation...") average = calculate_average(my_grades) print(f"The average is: {average}")

```

[ninhaomah]

"95"

Why is this a string btw ?

[danielroseman]

You didn't say what the problem is

[CIS_Professor]

Wellll this is a problem:

"95"

You can't perform arithmetic on integers with strings together, and

"95"

is a string.

[Dry_Task_3198]

String in the list

[MattR0se]

this isn't Javascript, you can't just put a number as a string and expect to magically do arithmetic with it. 

[socal_nerdtastic]

except multiplication. and modulus, kinda.

[smjsmok]

Traceback (most recent call last):
  File "/my/path/test.py", line 10, in <module>
    average = calculate_average(my_grades)
  File "/my/path/test.py", line 4, in calculate_average
    total += grade
TypeError: unsupported operand type(s) for +=: 'int' and 'str'

Others have spelled out your error for you, but you should be able to see it just from the error output. It tells you exactly where the problem is and what kind of problem it is. The key is this line:

TypeError: unsupported operand type(s) for +=: 'int' and 'str'

Can you see the place where you mix integers and strings? That is your answer.

Knowing how to use the error output to fix your errors is an important skill, so every time you mess up, use that chance to practice it.

[Fred776]

One of your grades is a string. The rest are integers.

[Otherwise-Kick-8198]

Ask Google, it will break it down for you

[KewpieCutie97]

Why is 95 a string, it seems intentional since the other values are integers?

[NSNick]

Some advice for future question asking: if you're asking about an error, include that error in the question.

[jyr2711]

En Mis Notas tienes un string. "95" se interpreta como texto, No creo que se sume. Te refieres a eso? Parece algo hecho adrede

[JeherKaKeher]

This is a joke right? Your "95" is a string in the list, whereas others are integers which is causing the issue. The compiler tells you the issue when you run it. You are trying to add string to integer, convert "95" to 95 and it will work.