Review JavaScript Fundamentals by Building a Gradebook App - Step 4

JavaScript
1

Tell us what’s happening:

i dont understand what the program want i try but now i have no clue

Your code so far

function getAverage(scores) {
  let sum = 0;

  for (const score of scores) {
    sum += score;
  }

  return sum / scores.length;
}

function getGrade(score) {
  if (score === 100) {
    return "A++";
  } else if (score >= 90) {
    return "A";
  } else if (score >= 80) {
    return "B";
  } else if (score >= 70) {
    return "C";
  } else if (score >= 60) {
    return "D";
  } else {
    return "F";
  }
}

function hasPassingGrade(score) {
  return getGrade(score) !== "F";
}


// User Editable Region

function studentMsg(totalScores, studentScore) {
  if(totalScores&&studentScore < 60){
 console.log("Class average: "+getAverage(totalScores)+" Your grade: "+getGrade(studentScore)+" You failed the course.");
  }
   else if(totalScores&&studentScore >= 60){
    console.log("Class average: "+getAverage(totalScores)+" Your grade: "+getGrade(studentScore)+" You passed the course.")
  }

}
console.log(studentMsg([92, 88, 12, 77, 57, 100, 67, 38, 97, 89], 37));

// User Editable Region

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Challenge Information:

Review JavaScript Fundamentals by Building a Gradebook App - Step 4

2

The function should return a string representing a message to the student.

Your function needs to return something but currently it returns nothing

3

Hi @Dr-z1

totalScores is an array, and studentScore is a number

When the condition is evaluated, it works out that input from the console log as:

37 < 60

which is true so the if condition will take precedence.

However …
I’ll run your code so see what happens.

4

okay thank you for replay

5

i will see and put return

6

function studentMsg(totalScores, studentScore) {
if(totalScores&&studentScore < 60){
return"Class average: “+getAverage(totalScores)+” Your grade: “+getGrade(studentScore)+” You failed the course.";

}

else if(totalScores&&studentScore >= 60){
return “Class average: “+getAverage(totalScores)+” Your grade: “+getGrade(studentScore)+” You passed the course.”
}

}
console.log(studentMsg([92, 88, 12, 77, 57, 100, 67, 38, 97, 89], 37));

the output is correct

7

but there an error message say

  1. Your function call of
studentMsg([92, 88, 12, 77, 57, 100, 67, 38, 97, 89], 37)

should return the following message:

"Class average: 71.7. Your grade: F. You failed the course."

. 2. Your function call of

studentMsg([56, 23, 89, 42, 75, 11, 68, 34, 91, 19], 100)

should return the following message:

"Class average: 50.8. Your grade: A++. You passed the course."

. 3. Your

studentMsg

function should return the correct message based on the student’s score and the class average. // tests completed // console output Class average: 71.7 Your grade: F You failed the course.

8

Compare your output to

"Class average: 71.7. Your grade: F. You failed the course." .

I do not like how the if condition is structured.
See if you can make it a little cleaner.

9

okay thank you i will

10

yes i compare it i forgot the . now its solved thank you and i will make the code cleaner in the future

1 Like
11

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