Javascript Basic Tutorial Data Type (Boolean)_Basic Knowledge

Javascript also has Boolean types, optional values, true or fasle.

Copy code The code is as follows:

var marr = true ;
Document.write(typeof(marr) "
");
var marr = "ture";
Document.write(typeof(marr) "
");

True or fasle of Boolean values ​​are two completely different concepts. Marr is assigned to Boolean true and string true respectively, and the difference can be clearly seen using the typeof() function.