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Math.PI - JavaScript | MDN
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Math.PI

Baseline Widely available

This feature is well established and works across many devices and browser versions. Its been available across browsers since 2015 7.

Math.PI , 3.14159 .

In this article

function calculateCircumference(radius) {
  return 2 * Math.PI * radius;
}

console.log(Math.PI);
// Expected output: 3.141592653589793

console.log(calculateCircumference(10));
// Expected output: 62.83185307179586

.=3.14159\mathtt{Math.PI} = \pi \approx 3.14159
Property attributes of Math.PI

PI Math , Math Math.PI . (Math )

Math.PI

Math.PI .

js
function calculateCircumference(radius) {
  return Math.PI * (radius + radius);
}

calculateCircumference(1); // 6.283185307179586

Specification
ECMAScript 2027 LanguageSpecification
# sec-math.pi

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