The _.isInteger() Method checks whether the given value is an Integer value or not and returns the corresponding boolean value.
Syntax:
_.isInteger( value );
Parameters:
- value: Given value to be checked for the Integer value.
Return Value: This method returns a Boolean value(Returns true if the given value is Integer, 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:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Integer : "
+ _.isInteger(-4));
|
Output:
The Value is Integer : true
Example 2:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Integer : " + _.isInteger(4.2));
|
Output:
The Value is Integer : false
Example 3: For this method values 4.0 and 4 both will be considered as an integer, so this method will return true.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Integer : " + _.isInteger(4.0));
|
Output:
The Value is Integer : true
Example 4: A string containing an Integer value will return true.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Integer : " + _.isInteger("4"));
|
Output:
The Value is Integer : true