Introduction to the use of isNaN of methods for global objects in javascript

  • 2020-03-30 01:00:54
  • OfStack

 
<html> 
<head> 
<title> Global object's isNaN() methods </title> 
<script> 
 
document.write(isNaN(123) + "<br/>");//false 
document.write(isNaN(-1.23) + "<br/>");//false 
document.write(isNaN(5-2) + "<br/>");//false 
document.write(isNaN(0) + "<br/>");//false 
document.write(isNaN("Hello") + "<br/>");//true 
document.write(isNaN("2005/12/12")+ "<br/>");//true 
</script> 
</head> 
<body> 
<div id="time"></div> 
</body> 
</html> 


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