Javascript Math sign() Method (original) (raw)

Last Updated : 15 Jul, 2024

The **Math.sign() is a built-in method in JavaScript and is used to know the sign of a number, indicating whether the number specified is negative or positive.

**Syntax:

Math.sign(number)

**Parameters:

• This method accepts a single parameter _number which represents the number whose sign you want to know.

**Return Value:

The Math.sign() method returns five different values as described below:

• It returns **1 if the argument passed is a positive number.
• It returns **-1 if the argument passed is a negative number.
• It returns **0 if the argument passed is a positive zero.
• It returns **-0 if the argument passed is a negative zero.
• If none of the above cases match, it returns **Nan.

**Example 1: When a positive number is passed as an argument.

JavaScript `

console.log(Math.sign(2));

`

**Example 2: When a negative number is passed as an argument:

JavaScript `

console.log(Math.sign(-2));

`

**Example 3: When a positive zero is passed as an argument:

JavaScript `

console.log(Math.sign(0));

`

**Example 4: When a negative zero is passed as an argument:

JavaScript `

console.log(Math.sign(-0));

`

**Example 5: When an invalid number is passed as an argument:

JavaScript `

console.log(Math.sign(haa));

`

**Output:

NaN

We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.

**Supported Browsers

• Chrome 51
• Edge 15
• Firefox 54
• Safari 10
• Opera 38