Underscore.js _.isNumeric() Method
The _.isNumeric() method checks whether the given value is a Numeric value or not, and returns the corresponding boolean value. It can be a string containing a numeric value, exponential notation or a Number object, etc.
Syntax:
_.isNumeric( value );
Parameters:
- value: Given value to be checked for Numeric value.
Return Value: This method returns a Boolean value(Returns true if the given value is Numeric, 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 Numeric : " + _.isNumeric(10000)); |
Output:
The Value is Numeric : true
Example 2: An array will always return false.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib'); // Checking console.log("The Value is Numeric : " + _.isNumeric([1,10])); |
Output:
The Value is Numeric : false
Example 3:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib'); // Checking console.log("The Value is Numeric : " + _.isNumeric(2.333)); |
Output:
The Value is Numeric : true
Example 4: A string containing numeric value will return true.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib'); // Checking console.log("The Value is Numeric : " + _.isNumeric("1000")); |
Output:
The Value is Numeric : true
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