Boolean object of JS

Source: Internet
Author: User
Boolean object

You can understand a Boolean object as an object wrapper that generates logical values.

A boolean (logical) object is used to convert non-logical values to logical values (true or false ).

Create a Boolean object

Use the keyword new to define a Boolean object. The following code defines a logical object named myboolean:

var myBoolean=new Boolean()

Note: If the logical object has no initial value or its value is 0,-0, null, "", false, undefined, Or Nan, the object value is false. Otherwise, the value is true (even when the independent variable is string "false )!

All the following code lines will create a Boolean object whose initial value is false.

var myBoolean=new Boolean();var myBoolean=new Boolean(0);var myBoolean=new Boolean(null);var myBoolean=new Boolean("");var myBoolean=new Boolean(false);var myBoolean=new Boolean(NaN);

Try it yourself

All the following code lines will create a Boolean object whose initial value is true:

var myBoolean=new Boolean(1);var myBoolean=new Boolean(true);var myBoolean=new Boolean("true");var myBoolean=new Boolean("false");var myBoolean=new Boolean("Bill Gates");

Try it yourself

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