The **Math.LOG2E** is a property in JavaScript which is simply used to find the value of base 2 logarithm of e, where e is an irrational and transcendental number approximately equal to 2.718

**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 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 use ().

**Syntax:**

Math.LOG2E;

- Here nothing is as parameter because Math.LOG2E is not a function but it is a property.
- It simply return the value of base 2 logarithm of e.

**Parameters:**

**Return Values:**

**Example:**

Input:Math.LOG2E

Output:1.4426950408889634

**Explanation:**

Here simply value of base 2 logarithm of e is shown as ouput.

**Let’s see JavaScript code for Math.LOG2E property:**

**Code #1:**

`// Here value of Math.LOG2E is printed. ` `console.log(Math.LOG2E); ` |

**Output:**

> 1.4426950408889634

**Code #2:**

Value of base 2 logarithm of e can be printed as in the form of function as shown below.

`// function is being called. ` `function` `get_Value_of_base_2_lagarithm_of_e() ` `{ ` ` ` `return` `Math.LOG2E; ` `} ` ` ` `// function is calling. ` `console.log(get_Value_of_base_2_lagarithm_of_e()); ` |

**Output:**

> 1.4426950408889634

**Errors and Exceptions:**

**Code #1:**

Here we consider Math.LOG2E as a function but in actual it is a property that is why error as output is being shown.

`// Here we consider Math.LOG2E as a function but in actual it ` `// is a property that is why error as output is being shown. ` `console.log(Math.LOG2E(12)); ` |

**Output:**

Error: Math.LOG2E is not a function

**Application:**

Whenever we need to find the value of base 2 logarithm of e that time we take the help of this property.In mathemaatics it needed a lot.

**Let’s see JavaScript program on this application:**

`// Value of Math.LOG2E is printed. ` `console.log(Math.LOG2E); ` |

**Output:**

> 1.4426950408889634

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