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Underscore.js _.isIncreasing() Method

Last Updated : 30 Jul, 2020
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The _.isIncreasing() method checks whether the given values are monotonically increasing or not or each argument is greater than the previous argument. 

Syntax:

_.isIncreasing(val1, val2, ..., valn);

Parameters: In this method, n values to checked for increasing order.

Return Value: This method returns a Boolean value(Returns true if the given values are Increasing, else false).

Note: This will not work in normal JavaScript because it requires the underscore.js contrib library to be installed. Underscore.js contrib library can be installed using npm install underscore-contrib .

Example 1: This method returns true.

JavaScript 
// Defining underscore contrib variable

var _ = require('underscore-contrib');

// Checking
console.log("The Value is Increasing : " 
    + _.isIncreasing(1, 2, 3, 4));

Output:

The Value is Increasing : true

Example 2: This method returns false.

JavaScript 
// Defining underscore contrib variable

var _ = require('underscore-contrib');

// Checking
console.log("The Value is Increasing : " 
    + _.isIncreasing(3, 2, 1, 2));

Output:

The Value is Increasing : false

Example 3: For string values in increasing order, this method returns true.

JavaScript 
// Defining underscore contrib variable

var _ = require('underscore-contrib');

// Checking
console.log("The Value is Increasing : " 
    + _.isIncreasing('a', 'b'));

Output:

The Value is Increasing : true

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Underscore.js _.isNegative() Method
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