<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<script type="text/javascript">
var sign =1;
var deno = 1;
var sum =0;
var t = sign * 1 / deno
while(Math.abs(t)>10e-10){
sum +=t
sign = sign * -1;
deno += 2;
t = sign *1 /deno;
}
var pi =sum * 4;
alert("π的值为："+pi);
</script>
<body>
</body>
</html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<script type="text/javascript">
var sign =1;
var deno = 1;
var sum =0;
var t = sign * 1 / deno
while(Math.abs(t)>10e-10){
sum +=t
sign = sign * -1;
deno += 2;
t = sign *1 /deno;
}
var pi =sum * 4;
alert("π的值为："+pi);
</script>
<body>
</body>
</html>
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