Build a Gradebook App - Build a Gradebook App

JavaScript
1

Tell us what’s happening:

my last function not working properly, I have put first two functions in variables and trying to use it in last function but no luck.

Your code so far

function getAverage(scores)
{
  let sum=0;
  let average;
  for(let char of scores)
  {
    sum += char;
    average=sum/scores.length;
  }
  return average;
} 
let averageGrade= getAverage([2,2]);
console.log(averageGrade);

function getGrade(grade) 
{
  let result;
  if(grade==100 )
  {
    result="A+";
  }
  else if(grade>=90 && grade <=99)
  {
    result="A";
  }
  else if(grade>=80 && grade <=89)
  {
    result="B";
  }
  else if(grade>=70 && grade <=79)
  {
    result="C";
  }
  else if(grade>=60 && grade <=69)
  {
    result="D";
  }
  else if(grade>=0 && grade <=59)
  {
    result="F";
  }
  return result;
}
let studentGrade=getGrade(40);
console.log(studentGrade);

function hasPassingGrade(num)
{
  
  let result1;
  if(num>=59)
  {
result1=true;
  }
  else
  {
   result1=false;
  }
  return result1
} 
let passingResult=hasPassingGrade(40);
console.log(passingResult);

function studentMsg(averageGrade,studentGrade) 
{
  let massage;
if(studentGrade=="F") 
{
massage=`Class average: ${averageGrade}. Your grade: ${studentGrade}. You failed the course.`
}
else
{
  massage=`Class average: ${averageGrade}. Your grade: ${studentGrade}. You passed the course.`
}
return massage;
}
console.log(studentMsg([92, 88, 12, 77, 57, 100, 67, 38, 97, 89], 37));

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Edg/145.0.0.0

Challenge Information:

Build a Gradebook App - Build a Gradebook App

2

if the function is called like this

that means that averageGrade is going to be an array, and studentGrade is going to be 37, right?

so here you get a number compared to "F"

and here

you are putting that array inside the string

3

what im expecting is since I have put ${averageGrade}. and ${studentGrade} two variable which stored the functions so it shud calculate the average and return alphabet for garde by considering all what I have done in function above so I do not need to repeat the function. If im wrong pls clarify.

4

this variable here exists outside the function

inside the function averageGrade is the value passed to the function parameter

see averageGrade here in the function definition?

that means that the value is the one passed in when the function is called

in this case [92, 88, 12, 77, 57, 100, 67, 38, 97, 89]

5

Ok, I got it but what is the other way of using those two functions calculations here, then

6

I thought that is global var so can be used in other function

7

you need to use the functions inside the function, if you use them outside the function you can’t get the values of the function parameters

8

Tried this and I can see average but the comparison with “F” is not fine it seems as all showing failed with “F” garde.

function studentMsg(scoreArr,stdGrade) 
{
let array=getAverage(scoreArr);
let marks=getGrade(stdGrade);
  let massage;
if(studentGrade=="F") 
{
massage=`Class average: ${array}. Your grade: ${studentGrade}. You failed the course.`
}
else
{
  massage=`Class average: ${marks}. Your grade: ${studentGrade}. You passed the course.`
}
return massage;
}
console.log(studentMsg([92, 88, 12, 77, 57, 100, 67, 38, 97, 89], 37));
console.log(studentMsg([56, 23, 89, 42, 75, 11, 68, 34, 91, 19], 100));
console.log(studentMsg([12, 22, 32, 42, 52, 62, 72, 92], 85));
9

if you have this, where does studentGrade variable take its value?

also, why are these different?

10

putting marks

if(marks=="F") 
showing this now:
Class average: 71.7. Your grade: F. You failed the course.
Class average: A+. Your grade: F. You passed the course.
Class average: B. Your grade: F. You passed the course.
11

should this be the average as a score or as a numerical value?

this is always F, where does studentGrade come from?

12

go thte silly mistake and its passed now, it was diff values here in message and comparison with marks worked, thanks for your patience :slight_smile: