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Use the square root sqrt () method in JavaScript

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Author: User
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Use the square root sqrt () method in JavaScript

This article mainly introduces how to use the square root of sqrt () method in JavaScript. It is the basic knowledge of JS beginners. For more information, see

This method returns the square root of a number. If the value of the number is negative, the operator returns NaN.

Syntax

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Math. sqrt (x );

The following is the detailed information about the parameters:

X: a number

Return Value:

Returns the sine of a number.

Example:

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<Html>

<Head>

<Title> JavaScript Math sqrt () Method </title>

</Head>

<Body>

<Script type = "text/javascript">

 

Var value = Math. sqrt (0.5 );

Document. write ("First Test Value:" + value );

 

Var value = Math. sqrt (81 );

Document. write ("<br/> Second Test Value:" + value );

 

Var value = Math. sqrt (13 );

Document. write ("<br/> Third Test Value:" + value );

 

Var value = Math. sqrt (-4 );

Document. write ("<br/> Fourth Test Value:" + value );

</Script>

</Body>

</Html>

This produces the following results:

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First Test Value: 0.7071067811865476

Second Test Value: 9

Third Test Value: 3.605551275463989

Fourth Test Value: NaN

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