JavaScript - Math.PI Property
The JavaScript Math.PI property is the ratio of the a circle's circumference to its diameter. It is approximately 3.14159.
Syntax
Math.PI
Example:
The example below shows the usage of Math.PI property.
var txt; var pi = Math.PI; txt = "pi = " + pi + "<br>"; txt = txt + "Math.sin(pi/2) = " + Math.sin(pi/2) + "<br>"; txt = txt + "Math.cos(pi/2) = " + Math.cos(pi/2) + "<br>"; txt = txt + "Math.tan(pi/2) = " + Math.tan(pi/2) + "<br><br>"; txt = txt + "Radius of a circle = 10 <br>"; txt = txt + "Circumference of the circle = " + (2 * pi * 10) + "<br>"; txt = txt + "Area of the circle = " + (pi * 10 * 10) + "<br>";
The output (value of txt) after running above script will be:
pi = 3.141592653589793 Math.sin(pi/2) = 1 Math.cos(pi/2) = 6.123233995736766e-17 Math.tan(pi/2) = 16331239353195370 Radius of a circle = 10 Circumference of the circle = 62.83185307179586 Area of the circle = 314.1592653589793
❮ JavaScript - Math Object