JavaScript Boolean type Object _ Basics

The Boolean object is similar to the Boolean package class in Java, and it has two values: True and False

1. Create a Boolean object

Copy Code code as follows:

var boo = new Boolean ()//The Boo is not assigned at this time, but its default value is False
var boo = new Boolean (true);
var boo = True/false;

2, the Boolean object's constructor property is a Boolean

Cases:

Copy Code code as follows:

var boo = new Boolean ();
document.write (Boo.constructor==boolean);
document.write (' <br> ');
document.write (Boo);

The output results are:

True
False

Description: Its constructor property is Boolean
If it is not assigned an initial value, it is false

3, ToString () method, returns a Boolean object corresponding to the string

True--->true;
False--->false;

Copy Code code as follows:

var boo = new Boolean ();
document.write (Boo);
document.write (' <br> ');
document.write (Boo.tostring ());

Output:

False
False

The output of these two methods is the same, somewhat similar to the output of some classes in Java

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