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 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`

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 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`

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.
 `// 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`

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
```

tags:

JavaScript javascript-math