PI < Math < JavaScript

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

    
    console.log(Math.PI);
    // 3.141592653589793


    // common, more-advanced example
    // calculate the circumference of a circle
    function calculateCircumference(radius) {
      return 2 * Math.PI * radius;
    }

    const circleCircumference = calculateCircumference(10));

    console.log(circleCircumference);
    // 62.83185307179586