The Math.PI static data property represents the ratio of the circumference of a circle to its diameter, approximately 3.14159.

Value

𝙼𝚊𝚝𝚑.𝙿𝙸=π≈3.14159\mathtt{\mi{Math.PI}} --> = \pi \approx 3.14159

Description

Because PI is a static property of Math, you always use it as Math.PI, rather than as a property of a Math object you created (Math is not a constructor).

Examples

Using Math.PI

The following function uses Math.PI to calculate the circumference of a circle with a passed radius.

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

calculateCircumference(1); // 6.283185307179586

Specifications

Browser compatibility

See also

• Math