The JavaScript Source: Math Related: Pi Machine

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Math Related

Pi Machine

This code will calculate the surface area and volume of cones, spheres or cylinders of any dimensions as well as circle circumference and surface areas.

Round to decimal points.

Circle
Radius:

Sphere
Radius:

Cylinder
Radius of base: height:

Cone
Radius of base: height:

Go to JavaScriptSource for more in free scripts.

The JavaScript Source: Math Related: Pi Machine
Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Command-s). The script is yours!!!

  <HEAD>     <script> function roundnum(pinum){ var numtimes=0; var currentpower=1; var currentround; while (numtimes<rounding.options.selectedIndex) {currentpower=currentpower*10;numtimes=numtimes+1;} currentround=Math.round(pinum*currentpower)/currentpower; return currentround; } function show(what){ showfield.innerHTML=what; } function workcircle(){ if (circleradius.value=="") circleradius.value="0"; var pinum=roundnum(Math.PI*circleradius.value*circleradius.value); show("The area of a circle with a radius of "+circleradius.value+":<br><input type=text size=20 value="+pinum+"> units squared."); } function workcircle2(){ if (circleradius.value=="") circleradius.value="0"; var pinum=roundnum(2*Math.PI*circleradius.value); show("The circumference of a circle with a radius of "+circleradius.value+":<br><input type=text size=20 value="+pinum+"> units."); } function worksphere(){ if (sphereradius.value=="") sphereradius.value="0"; var pinum=roundnum(4*Math.PI*sphereradius.value*sphereradius.value*sphereradius.value/3) show("The volume of a sphere with a radius of "+sphereradius.value+":<br><input type=text size=20 value="+pinum+"> units cubed."); } function worksphere2(){ if (sphereradius.value=="") sphereradius.value="0"; var pinum=roundnum(4*Math.PI*sphereradius.value*sphereradius.value); show("The surface area of a sphere with a radius of "+sphereradius.value+":<br><input type=text size=20 value="+pinum+"> units squared."); } function workcylinder(){ if (cylinderradius.value=="") cylinderradius.value="0"; if (cylinderheight.value=="") cylinderheight.value="0"; var pinum=roundnum(Math.PI*cylinderradius.value*cylinderradius.value*cylinderheight.value); show("The volume of a cylinder with a base radius of "+cylinderradius.value+" and a height of "+cylinderheight.value+":<br><input type=text size=20 value="+pinum+"> units cubed."); } function workcylinder2(){ if (cylinderradius.value=="") cylinderradius.value="0"; if (cylinderheight.value=="") cylinderheight.value="0"; var pinum=roundnum((2*Math.PI*cylinderradius.value*cylinderradius.value)+(2*Math.PI*cylinderradius.value*cylinderheight.value)); show("The surface area of a cylinder with a base radius of "+cylinderradius.value+" and a height of "+cylinderheight.value+":<br><input type=text size=20 value="+pinum+"> units squared."); } function workcone(){ if (coneradius.value=="") coneradius.value="0"; if (coneheight.value=="") coneheight.value="0"; var pinum=roundnum(Math.PI*coneradius.value*coneradius.value*coneheight.value/3); show("The volume of a cone with a base radius of "+coneradius.value+" and a height of "+coneheight.value+":<br><input type=text size=20 value="+pinum+"> units cubed."); } function workcone2(){ if (coneradius.value=="") coneradius.value="0"; if (coneheight.value=="") coneheight.value="0"; var pinum=roundnum(Math.PI*coneradius.value*Math.sqrt((coneheight.value*coneheight.value)+((coneradius.value/2)*(coneradius.value/2)))); show("The surface area of a cone with a base radius of "+coneradius.value+" and a height of "+coneheight.value+":<br><input type=text size=20 value="+pinum+"> units squared."); } </script> </HEAD>  <BODY>     <hr> <table align=center border="0" cellpadding="0" cellspacing="0"><tr><td> <p>Round to <select size="1" id="rounding"> <option>0</option> <option>1</option> <option selected>2</option> <option>3</option> <option>4</option> <option>5</option> <option>6</option> <option>7</option> <option>8</option> <option>9</option> </select> decimal points. </p> <p><b>Circle<br> </b>Radius: <input type="text" size=14 name=circleradius maxlength=10 onKeypress="if (event.keyCode < 46 || event.keyCode > 57 || event.keyCode==47) event.returnValue = false;"> <input type="button" value="Area" onclick=workcircle()> <input type="button" value="Circumference" onclick=workcircle2()></p> <p><b>Sphere</b><br> Radius: <input type="text" size=14 name=sphereradius onKeypress="if (event.keyCode < 46 || event.keyCode > 57 || event.keyCode==47) event.returnValue = false;"> <input type="button" value="Volume" onclick=worksphere()> <input type="button" value="Surface Area" onclick=worksphere2()></p> <p><b>Cylinder</b><br> Radius of base: <input type="text" size=14 name=cylinderradius onKeypress="if (event.keyCode < 46 || event.keyCode > 57 || event.keyCode==47) event.returnValue = false;"> height: <input type="text" size=14 name=cylinderheight onKeypress="if (event.keyCode < 46 || event.keyCode > 57 || event.keyCode==47) event.returnValue = false;"> <input type="button" value="Volume" onclick=workcylinder()> <input type="button" value="Surface Area" onclick=workcylinder2()></p> <p><b>Cone</b><br> Radius of base: <input type="text" size=14 name=coneradius onKeypress="if (event.keyCode < 46 || event.keyCode > 57 || event.keyCode==47) event.returnValue = false;"> height: <input type="text" size=14 name=coneheight onKeypress="if (event.keyCode < 46 || event.keyCode > 57 || event.keyCode==47) event.returnValue = false;"> <input type="button" value="Volume" onclick=workcone()> <input type="button" value="Surface Area" onclick=workcone2()></p> </td></tr></table> <hr> <p id=showfield align="center"></p> <p>Go to <a href=http://javascript.internet.com/>JavaScriptSource</a> for more in free scripts.</p> <p><center> <font face="arial, helvetica" size"-2">Free JavaScripts provided<br> by <a href="http://javascriptsource.com">The JavaScript Source</a></font> </center><p> 
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