Question

Write JavaScript codes that count how many As, Bs, Cs in the following scores array, and...

Write JavaScript codes that count how many As, Bs, Cs in the following scores array, and calculate the average of the scores (Note: you can’t hard code the computation) A range >=90; 90>B range >=80; 90> C range >=70

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Answer #1

<!DOCTYPE html>
<html>
<body>

<button onclick="myFunction()">Click me</button>


<script>
function myFunction() {
var arr=[88,76,75,80,99,100,96,72];
var total=0,aCount=0,bCount=0,cCount=0;
for(i=0;i<arr.length;i++){
   if(arr[i]>=90)
       aCount++;
   else if(arr[i]>=80)
       bCount++;
   else if(arr[i]>=70)
       cCount++;
   total=total+arr[i];
}
alert("A's: "+aCount+"\nB's: "+bCount+"\nC's: "+cCount+"\nAverage: "+(total/arr.length));
}
</script>

</body>
</html>

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