Underscore.js _.isNaN() Function

Underscore.js _.isString() Function

Last Updated : 01 Aug, 2023

The _.isString() function is used to check whether the given object element is string or not.

Syntax:

_.isString( object )

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

object: It contains the value of object that need to be check whether it is an string or not.

Return Value: It returns a Boolean value True if given object element is string, False otherwise.

Example 1:

<!DOCTYPE html> 
<html> 
  
<head> 
    <script type="text/javascript" 
            src= 
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> 
    </script> 
</head> 
  
<body> 
    <script type="text/javascript"> 
  
        var info = { 
            Company: 'GeeksforGeeks', 
            Address: 'Noida', 
            Contact: '+91 9876543210' 
        }; 
        console.log(_.isString(info)); 
  
        var str = 'GeeksforGeeks'; 
        console.log(_.isString(str)); 
    </script> 
</body> 
  
</html> 

Output:

Example 2:

<!DOCTYPE html> 
<html> 
  
<head> 
    <script type="text/javascript" 
            src= 
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> 
    </script> 
</head> 
  
<body> 
    <script type="text/javascript"> 
  
        console.log(_.isString(true)); 
        console.log(_.isString(10)); 
        console.log(_.isString('GeeksforGeeks')); 
        console.log(_.isString("20")); 
    </script> 
</body> 
  
</html> 

Output:

Underscore.js _.isNaN() Function

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