The Math.PI is a property in JavaScript which is simply used to find the value of Pi i.e, in symbolic form Π which is nothing but it is the ratio of circumference of a circle to its diameter, whose value is approximately 3.141
It is mainly used in mathematics problem.
Difference between property and function in javascript.
Property in JavaScript is nothing but a value whereas method is a function this can be understood anith the help of a example given below.
// car is an object. var car = {}; // car.name is a propety of the given object. car.name = "Audi" , // car.sayModel is a function of the given object. car.sayModel = function () { console.log( "A8" ); } // printing property value. console.log(car.name); // printing function called value. console.log(car.sayModel()); |
Output:
> "Audi" > "A8"
Here as we can see that property of the object car, is going to store the string as “Audi” and it can be accessed with car.name.
sayModel is a method i.e, a function of the object and it can be accessed with car.sayModel().
It can be noticed that sayModel is just a function which uses ().
Syntax:
Math.PI
- Here nothing is passed as a parameter because, Math.PI is not a function but it is a property.
- It simply return the value of PI i.e, Π
Parameters:
Return Values:
Example:
Input: Math.PI
Output: 3.141592653589793
Explanation:
Here simply value of PI i.e, Π is shown as ouput.
Let’s see JavaScript code for Math.PI property:
Code #1:
// Here value of Math.PI is printed. console.log(Math.PI); |
Output:
> 3.141592653589793
Code #2:
Value of PI i.e, Π can be printed as in the form of function as shown below.
// function is being called. function get_Value_of_PI() { return Math.PI; } // function is calling. console.log(get_Value_of_PI()); |
Output:
> 3.141592653589793
- Here we consider Math.PI as a function but in actual it is a property that is why error as output is being shown.
// Here we consider Math.PI as a function but in actual it
// is a property that is why error as output is being shown.
console.log(Math.PI(12));
Output:
Error: Math.PI is not a function
Errors and Exceptions:
Application:
Whenever we need to find the value of anything related to PI that time we take the help of this property.In mathemaatics it needed a lot.
Let’s see JavaScript program on this application:
Code #1:
Here we are going to find the value of area of a circle with given value of its radius.
// function is being called with radius 5 as parameter. function area_of_circle(radius_of_the_circle) { return Math.PI * radius_of_the_circle * radius_of_the_circle; } // Here area of the circle is 5 unit. console.log(area_of_circle(5)); |
Output:
Here unit is square unit. > 78.53981633974483
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