Javascript Boolean Object
Create a Boolean Object
Examples
The Boolean object is ued to convert a non-boolean value to a boolean value
Create a boolean object
The Boolean object repesents two values : true or false.
var myBoolean= new boolean();
If the boolean object has no initial value or if it is 0, -0,null, " ", false, undefined, or NaN, the object is set to false.
otherwise it is true
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);
true:
var myBoolean=new Boolean(true);
var myBoolean=new Boolean("true");
var myBoolean=new Boolean("false");
var myBoolean=new Boolean("Richard");
Examples:
<html>
<body>
<script type="text/javascript">
var b1=new Boolean(0);
var b1=new Boolean(1);
var b1=new Boolean("");
var b1=new Boolean(null);
var b1=new Boolean(NaN);
var b1=new Boolean("false");
document.write("0 is boolean "+b1+"<br/>");
document.write("1 is boolean "+b2+"<br/>");
document.write("An empty string is boolian"+b3+"<br/>");
document.write("null is boolean"+b4+"<br/>");
document.write("NaN is boolean"+b5+"<br/>");
document.write("The string 'false' is boolean "+b6"<br/>");
</script>
</body>
</html>
Create a Boolean Object
Examples
The Boolean object is ued to convert a non-boolean value to a boolean value
Create a boolean object
The Boolean object repesents two values : true or false.
var myBoolean= new boolean();
If the boolean object has no initial value or if it is 0, -0,null, " ", false, undefined, or NaN, the object is set to false.
otherwise it is true
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);
true:
var myBoolean=new Boolean(true);
var myBoolean=new Boolean("true");
var myBoolean=new Boolean("false");
var myBoolean=new Boolean("Richard");
Examples:
<html>
<body>
<script type="text/javascript">
var b1=new Boolean(0);
var b1=new Boolean(1);
var b1=new Boolean("");
var b1=new Boolean(null);
var b1=new Boolean(NaN);
var b1=new Boolean("false");
document.write("0 is boolean "+b1+"<br/>");
document.write("1 is boolean "+b2+"<br/>");
document.write("An empty string is boolian"+b3+"<br/>");
document.write("null is boolean"+b4+"<br/>");
document.write("NaN is boolean"+b5+"<br/>");
document.write("The string 'false' is boolean "+b6"<br/>");
</script>
</body>
</html>
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