<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>Square Root Table</title>
</head>
<body>
<script>
"use strict";
var currValue = 0,
maximumValue;
/* Reading a value from the user and verifying is correct */
do {
maximumValue = Number(prompt("Enter a value"));
if (maximumValue < 0)
alert("Invalid value: " + maximumValue);
} while (maximumValue < 0);
/* Generating the table */
// document.writeln writes a string of text followed by a newline
// character to a document. Try also document.write(...)
document.writeln("<table border=\"10\">");
document.writeln("<caption><strong>Square Root Table</strong></caption>");
document.writeln("<tr><th>Number</th><th>Square Root</th></tr>");
while (currValue <= maximumValue) {
document.writeln("<tr><td>" + currValue + "</td><td>" +
Math.sqrt(currValue) + "</td></tr>");
currValue = currValue + 1;
}
document.writeln("</table>");
</script>
</body>
</html>