programming-examples/js/Vre2/Validate whether a given value is number or not.js

    function is_number(value)  
            {  
            return !isNaN(value) && toString.call(value) === '[object Number]';  
           }  
      
    console.log(is_number(NaN));  
      
    console.log(is_number(42.32));  
      
    console.log(is_number(72));