Math.PI

Summary

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

Example: Using Math.PI

The following function returns the value of pi:

function getPi() {
   return Math.PI
}

getPi() // 3.141592653589793

Specifications

Browser compatibility

See also

• The Math object it belongs to.