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/ 9 Years ago, fri, december 18, 2015, 12:00:00
I'm trying to create a simple javascript application that will ask the user to enter the radius of a circle, and in return will display the circumference and area in sentence form after the user hits Calculate. Right now, when the user enters a number and hits calculate, nothing happens.
The JavaScript is included in the HTML document like this:
<!DOCTYPE html>
<html>
<head>
<meta charset = utf-8>
<title>Create a Circle</title>
<h1 style=text-align:center>Create a Circle!</h1>
<br>
<div style=text-align:center>
Enter the radius for your circle:
<input type=text id=txtRadius size=10 />
<br>
<input type=button value=Calculate onclick=CalculateArea()/>
<script>
function print() {
var p =
document.createElement(p),
text = Array.prototype.join.call(arguments,,);
p.textContent = text;
document.getElementById(console).appendChild(p);
return text;
}
function CalculateCircumference() {
var radius =
parseInt(document.getElementById('txtRadius').value);//String to Integer
if (0 < radius)
print(The circumference of the circle is + (radius * 2 * Math.PI);
else
print(Error - radius must be a whole number greater than 0.);
return false;
}
function CalculateArea() {
var radius =
parseInt(document.getElementById('txtRadius').value); //String to Integer
if (0 < radius)
print(The area of the circle is + (radius * radius * Math.PI);
else
print(Error - radius must be a whole number greater than 0.);
return false;
}
</script>
</head>
<body>
</body>
</html>
I'm new to the print method so I tried changing all prints to alert, but this didn't do anything. Thank you for your help. Link to JSFiddle: https://jsfiddle.net/HappyHands31/xzsf8ca4/2/
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