The **Math.SQRT1_2** is a property in JavaScript which is simply used to find the value of square root of 1/2, whose value is approximately **0.707106**.

That is,

√ (1/2) = 0.707106

**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 use ().

**Syntax:**

Math.SQRT1_2;

- Here nothing is passed as a parameter because, Math.SQRT1_2 is not a function but it is a property.
- It simply returns the value of the value of square root of 1/2, whose value is approximately 7071.

**Parameters:**

**Return Values:**

**Example:**

Input:Math.SQRT1_2

Output:0.7071067811865476

**Explanation:**

Here simply value of square root of 1/2 is shown as ouput.

**Let’s see JavaScript code for Math.SQRT1_2 property:**

**Code #1:**

`// Here value of SQRT1_2 is printed. ` `console.log(Math.SQRT1_2); ` |

**Output:**

> 0.7071067811865476

**Code #2:**

Value of square root of 1/2 can be printed as in the form of function as shown below.

`// function is being called. ` `function` `get_Value_of_square_root() ` `{ ` ` ` `return` `Math.SQRT1_2; ` `} ` `// function is calling for getting ` `// value of square root of 1/2 ` `console.log(get_Value_of_square_root()); ` |

**Output:**

> 0.7071067811865476

**Errors and Exceptions:**

**Code #1:**

Here we consider Math.SQRT1_2 as a function but in actual it is a property that is why error as output is being shown.

`// Here we consider Math.SQRT1_2 as a function but in actual it ` `// is a property that is why error as output is being shown. ` `console.log(Math.SQRT1_2(12)); ` |

**Output:**

Error: Math.SQRT1_2 is not a function

**Application:**

Its application is to find the value of square root of 1/2 which is done with the help of this property.In mathemaatics it needed a lot.

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

`// Value of Math.SQRT1_2 is printed. ` `console.log(Math.SQRT1_2); ` |

**Output:**

> 0.7071067811865476

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