JavaScript | Math.PI Property

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 the circumference of a circle to its diameter, whose value is approximately 3.141. It is mainly used in a 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 with the help of an example given below.

<script>  
  
// car is an object.  
var car = {};  
  
// car.name is a property of the given object.  
car.name = "Audi",  
  
    // car.sayModel is a function of the given object.  
    car.sayModel = function() {  
        document.write("A8 <br>");  
    }  
                  
    // printing property value.  
    document.write(car.name + '<br>');  
                  
car.sayModel();      
</script>  

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

Parameters: Here nothing is passed as a parameter because, Math.PI is not a function but it is a property.

Return values: It simply return the value of PI i.e, Π

Example:

Input : Math.PI
Output: 3.141592653589793

Explanation:Here simply value of PI i.e, Π is shown as output.

Let’s see JavaScript code for Math.PI property:

Example 1:

<script>

// Here value of Math.PI is printed.

document.write(Math.PI);

</script>
Output:
```
3.141592653589793
```

Example 2:Value of PI i.e, Π can be printed as in the form of function as shown below.

<script> 
  // function is being called. 
  function get_Value_of_PI() 
  { 
      return Math.PI; 
  } 
  
  // function is calling. 
  document.write(get_Value_of_PI()); 
</script> 

Output:

3.141592653589793

Errors and Exceptions: Here we consider Math.PI as a function but in actual it is a property that is why error as output is being shown.

<script> 
  // Here we consider Math.PI as a function but 
  // in actual it is a property that is why error 
  // as output is being shown. 
  document.write(Math.PI(12)); 
</script> 

Output:

Error: Math.PI is not a function

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 the JavaScript program on this application:

Example:Here we are going to find the value of the area of a circle with the given value of its radius.

<script> 
  // 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. 
  document.write(area_of_circle(5)); 
</script> 

Output:

78.53981633974483

Supported Browsers: The browsers supported by JavaScript Math.PI Property are listed below:

Google Chrome
Internet Explorer
Firefox
Opera
Safari

My Personal Notes

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