Lodash _.neg() Method

Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.

The _.neg() method is used to return a new number with the opposite sign value of the given number.

Syntax:

_.neg( value )

Parameters: This method accepts a single parameter as mentioned above and described below:

• value: It is the number to be negated with this method.

Return Value: This method returns a new number with the opposite sign value of the given number.

Note: This will not work in normal JavaScript because it requires the lodash contrib library to be installed. The Lodash contrib library can be installed using npm install lodash-contrib –save.

Example 1:

Javascript

// Defining lodash contrib variable
var _ = require('lodash-contrib');

// Using the _.neg() method
var n  = _.neg( -1 );

console.log(
  "Opposite sign value number is :", n
);

Output:

Opposite sign value number is : 1

Example 2:

Javascript

// Defining lodash contrib variable
var _ = require('lodash-contrib');

// Using the _.neg() method
var n  = _.neg( 1 );

console.log(
  "Opposite sign value number is :", n
);

Output:

Opposite sign value number is : -1

Example 3:

Javascript

// Defining lodash contrib variable
var _ = require('lodash-contrib');

// Using the _.neg() method
var n  = _.neg( 60 );

console.log(
  "Opposite sign value number is :", n
);

Output:

Opposite sign value number is : -60

Example 4:

Javascript

// Defining lodash contrib variable
var _ = require('lodash-contrib');

// Using the _.neg() method
var n  = _.neg( -50 );

console.log(
  "Opposite sign value number is :", n
);

Output:

Opposite sign value number is : 50