# I need help

## I learn course Full-Stack engineer! But i can’t complete once task.

### Instructions

1.

Write a function, `finalGrade()` . It should:

• take three arguments of type number
• find the `average` of those three numbers
• return the letter grade (as a string) that the `average` corresponds to
• return ‘You have entered an invalid grade.’ if any of the three grades are less than 0 or greater than 100

## 0-59 should return: `'F'` 60-69 should return: `'D'` 70-79 should return: `'C'` 80-89 should return: `'B'` 90-100 should return: `'A'`

i try complete it for a week!

Hello @5311118096, welcome to the forums! Could you please post your code? To format it correctly, see ->this<- post.

``````
onst finalGrade = (...a) => {

02

if(a.some(a => a < 0 || a > 100)) return `вы ввели недопустимую оценку.`;

03

a = a.reduce((a,b)=> a + b) / a.length;

04

let i = 1;

05

for ( ; i < 6; i++) {

06

if(a >= (100 - 10 * i)) break;

07

}

08

return String.fromCharCode(64 + i)

09

}

10

``````

i try do it how in instruction but what should I do about it.

OMG i’m STUPID((((

I know what this code don’t correct(((

Should `onst` be `const`?(I’m sure that’s just a matter of copy/paste!)

Aside. There’s nothing actually wrong with your code-it definitely performs the given task. It’s just that CC wants the exact text `'You have entered an invalid grade.'` (in English), so if you just change the line where you say that in (Russian, is it?) to the English sentence, it should pass.

const variable! `onst` do not in code.

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OMG it is easy. I definitely STUPID)))
Thank you!

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