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summary.html
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<!DOCTYPE html>
<head>
<title>Grade Summary</title>
<link rel="stylesheet" href="site.css">
</head>
<body>
<h4>Grade Summary App</h4>
<h1>Summary</h1>
<div id="container">
<div class="display-row">
<div>
<label>Number of Marks</label>
</div>
<div id="numMarks" class="summary-box"></div>
</div>
<div class="display-row">
<div>
<label>Total Marks</label>
</div>
<div id="totalMarks" class="summary-box"></div>
</div>
<div class="display-row">
<div>
<label>Average Mark</label>
</div>
<div id="averageMarks" class="summary-box"></div>
</div>
<div class="display-row">
<div>
<label>Highest</label>
</div>
<div id="highestMark" class="summary-box"></div>
</div>
<div class="display-row">
<div>
<label>Lowest</label>
</div>
<div id="lowestMark" class="summary-box"></div>
</div>
</div><br>
<div>
<button onclick="mainPage()">Main Page</button>
</div>
<script type="application/javascript">
const gradeString = localStorage.getItem("gradeArray");
const gradeArray = gradeString.split(',');
const numMarks = gradeArray.length;
document.getElementById("numMarks").innerHTML = numMarks;
const lowestMark = calcLowest();
document.getElementById("lowestMark").innerHTML = lowestMark;
function calcLowest() {
let lowest=null;
for (i = 0; i < gradeArray.length; i++) {
if (lowest == null) {
lowest = parseInt(gradeArray[i]);
} else {
let thisMark = parseInt(gradeArray[i]);
if (thisMark < lowest) {
lowest = thisMark;
}
}
}
return lowest;
}
const highestMark = calcHighest();
document.getElementById("highestMark").innerHTML = highestMark;
function calcHighest() {
let highest=null;
for (i = 0; i < gradeArray.length; i++) {
if (highest == null) {
highest = parseInt(gradeArray[i]);
} else {
let thisMark = parseInt(gradeArray[i]);
if (thisMark > highest) {
highest = thisMark;
}
}
}
return highest;
}
const totalMarks = calculateTotalMarks();
document.getElementById("totalMarks").innerHTML =totalMarks;
function calculateTotalMarks() {
let totalMarks=0;
for (i = 0; i < gradeArray.length; i++)
{
totalMarks+=parseInt(gradeArray[i]);
}
return totalMarks;
}
const averageMarks = calculateAverageMark();
document.getElementById("averageMarks").innerHTML = averageMarks;
function calculateAverageMark() {
let averageMarks=0; let totalMarks=0;
for (i = 0; i < gradeArray.length; i++)
{
averageMarks=totalMarks+=parseInt(gradeArray[i])/gradeArray.length;
}
return averageMarks;
}
function mainPage() {
window.open("main.html", "_self");
}
</script>
</body>