JavaScript Boolean valueOf() Method
The boolean.valueOf() method is used to return a boolean value either “true” or “false” depending upon the value of the specified boolean object.
Syntax:
boolean.valueOf()
Parameter: This method does not accept any parameter.
Return value: It returns a boolean value either “true” or “false” depending upon the value of the specified boolean object.
Example 1: Below is an example of the Boolean valueOf() method.
javascript
// Here Boolean object obj // is created for the value 27let obj = new Boolean(27);// Here boolean.valueOf() function is // used for the created object obj.console.log(obj.valueOf()); |
Output:
true
Example 2: Here the Boolean object is created with the value true and used with the boolean.valueOf() method.
javascript
// Here Boolean object obj is created // for the value true.let obj = new Boolean(true);// Here boolean.valueOf() function is // used for the created object obj.console.log(obj.valueOf()); |
Output:
true
Example 3: Here the Boolean object is created with the value 1 and used with the boolean.valueOf() method.
javascript
// Here Boolean object obj is// created for the value 1.let obj = new Boolean(1);// Here boolean.valueOf() function // is used for the created object obj.console.log(obj.valueOf()); |
Output:
true
Example 4: Here the Boolean object is created with the value -1 and used with the boolean.valueOf() method.
javascript
// Here Boolean object obj is // created for the value -1.let obj = new Boolean(-1);// Here boolean.valueOf() function// is used for the created object obj.console.log(obj.valueOf()); |
Output:
true
Example 5: Here the Boolean object is created with the value 1.2 and used with the boolean.valueOf() method.
javascript
// Here Boolean object obj is // created for the value 1.2let obj = new Boolean(1.2);// Here boolean.valueOf() function // is used for the created object obj.console.log(obj.valueOf()); |
Output:
true
Example 6: Here the Boolean object is created with the string value gfg and used with the boolean.valueOf() method.
javascript
// Here Boolean object obj is // created for the value as string "gfg"let obj = new Boolean("gfg");// Here boolean.valueOf() function is // used for the created object obj.console.log(obj.valueOf()); |
Output:
true
Example 7: Here the Boolean object is created with the value false and used with the boolean.valueOf() method.
javascript
// Here Boolean object obj is created for the value false.let obj = new Boolean(false);// Here boolean.valueOf() function is// used for the created object obj.console.log(obj.valueOf()); |
Output:
false
Example 8: Here the Boolean object is created with the value 0 and used with the boolean.valueOf() method.
javascript
// Here Boolean object obj is created // for the value zero (0)let obj = new Boolean(0);// Here boolean.valueOf() function is // used for the created object obj.console.log(obj.valueOf()); |
Output:
false
Program 9: Here the value as geeksforgeeks gives an error because this value is not defined only true and false have been predefined.
javascript
// Here Boolean object obj is created // for the value geeksforgeeks.let obj = new Boolean(geeksforgeeks);// Here boolean.valueOf() function is// used for the created object obj.console.log(obj.valueOf()); |
Output:
Error: geeksforgeeks is not defined
Program 10: Here complex numbers can not be taken as the parameter only integer values and strings can be taken as the parameter which is why it returns an error.
javascript
// Here Boolean object obj is created // for the value such as complex number 1+2ilet obj = new Boolean(1 + 2i);// Here boolean.valueOf() function is// used for the created object obj.console.log(obj.valueOf()); |
Output:
Error: Invalid or unexpected token
We have a complete list of Javascript Boolean methods, to check those please go through the Javascript Boolean Complete Reference article.
Supported Browsers: The browsers supported by JavaScript Boolean valueOf() Method are listed below:
- Google Chrome 1 and above
- Internet Explorer 4 and above
- Mozilla Firefox 1 and above
- Safari 1 and above
- Opera 4 and above
