Nugroho's blog.: Mencari Pi

Wednesday, April 24, 2013

Mencari Pi



Nilai Pi

Mencoba tanpa webworker. Pi dapat dihitung dengan kode berikut

var Pi=0, n=1, c=100000;
for (var i=0;i<=c;i++) {
Pi=Pi+(4/n)-(4/(n+2));
n=n+4;
}

perintah dalam tag <script> adalah sebagai berikut



function HitungPi()
{
var loop = document.getElementById("loop");
var c = parseInt(loop.value);
var f = parseFloat(loop.value);
var Pi=0, n=1;

try {
if (isNaN(c) || f != c ) {
throw("errInvalidNumber");
} else if (c<=0) {
throw("errNegativeNumber");
}

for (var i=0;i<=c;i++) {
Pi=Pi+(4/n)-(4/(n+2));
n=n+4;
}
document.getElementById("PiValue").innerHTML = Pi;
} catch (e) {
var msg = "Input Error: ";
if (e=="errInvalidNumber")
msg += "harus angka.";
else if (e=="errNegativeNumber")
msg += "Input harus positif.";
else
msg += e.message;

alert(msg);
}
}

.
Perintah dalam <body>

<label for="loop">Jumlah iterasi:</label>
<input id="loop" type="number" value="100" />
<input type="button" onclick="HitungPi()" value="Hitung Pi" />
<div id="PiValue">Nilai Pi</div>

No comments:

323f (5) amp (1) android (12) apple (7) arduino (18) art (1) assembler (21) astina (4) ATTiny (23) blackberry (4) camera (3) canon (2) cerita (2) computer (106) crazyness (11) debian (1) delphi (39) diary (286) flash (8) fortran (6) freebsd (6) google apps script (8) guitar (2) HTML5 (10) IFTTT (7) Instagram (7) internet (12) iOS (5) iPad (6) iPhone (5) java (1) javascript (1) keynote (2) LaTeX (6) lazarus (1) linux (29) lion (15) mac (28) macbook air (8) macbook pro (3) macOS (1) Math (3) mathematica (1) maverick (6) mazda (4) microcontroler (35) mountain lion (2) music (37) netbook (1) nugnux (6) os x (36) php (1) Physicist (29) Picture (3) programming (189) Python (109) S2 (13) software (7) Soliloquy (125) Ubuntu (5) unix (4) Video (8) wayang (3) yosemite (3)