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JavaScript Boolean toString() Method
  • Last Updated : 27 Jun, 2020

Below is the example of Boolean toString() method.

  • Example:




    <script>
      // Here Boolean object obj 
      // is created for the value 27
      var obj = new Boolean(27);
      
      // Here boolean.toString() function is 
      // used for the created object obj.
      document.write(obj.toString());
    </script>
  • Output:
    true

The boolean.toString() method is used to return a string either “true” or “false” depending upon the value of the specified boolean object.

Syntax:

boolean.toString()

Parameter: This method does not accept any parameter.
Return Values: It returns a string either “true” or “false” depending upon the value of the specified boolean object.

More codes for the above method are as follows:



  • Example 1:




    <script>
      // Here Boolean object obj is 
      // created for the value true.
      var obj = new Boolean(true);
      
      // Here boolean.toString() function
      // is used for the created object obj.
      document.write(obj.toString());
    </script>

    Output:

    true
  • Example 2:




    <script>
      // Here Boolean object obj is 
      // created for the value 1.
      var obj = new Boolean(1);
      
      // Here boolean.toString() function is
      // used for the created object obj.
      document.write(obj.toString());
    </script>

    Output:

    true
  • Example 3:




    <script>
      // Here Boolean object obj is
      // created for the value -1.
      var obj = new Boolean(-1);
      
      // Here boolean.toString() function is
      // used for the created object obj.
      document.write(obj.toString());
    </script>

    Output:

    true
  • Example 4:




    <script>
      // Here Boolean object obj is
      // created for the value 1.2
      var obj = new Boolean(1.2);
      
      // Here boolean.toString() function is
      // used for the created object obj.
      document.write(obj.toString());
    </script>

    Output:

    true
  • Example 5:




    <script>
      // Here Boolean object obj is created 
      // for the value as string "gfg"
      var obj = new Boolean("gfg");
      
      // Here boolean.toString() function is 
      // used for the created object obj.
      document.write(obj.toString());
    </script>

    Output:

    true
  • Example 6:




    <script>
      // Here Boolean object obj is created
      // for the value false.
      var obj = new Boolean(false);
      
      // Here boolean.toString() function is
      // used for the created object obj.
      document.write(obj.toString());
    </script>

    Output:

    false

Errors and Exceptions:

  • Example 1: Here the value as geeksforgeeks gives error because this value is not defined only true and false has been predefined.




    <script>
      // Here Boolean object obj is created 
      // for the value geeksforgeeks.
      var obj = new Boolean(geeksforgeeks);
      
      // Here boolean.toString() function is
      // used for the created object obj.
      console.log(obj.toString());
    </script>

    Output:

    Error: geeksforgeeks is not defined
  • Example 2: Here complex number can not be taken as the parameter only integer values and string can be taken as the parameter that is why it returns error.




    <script>
      // Here Boolean object obj is created for the
      // value such as complex number 1+2i
      var obj = new Boolean(1 + 2i);
      
      // Here boolean.toString() function is 
      // used for the created object obj.
      console.log(obj.toString());
    </script>

    Output:

    Error: Invalid or unexpected token

Supported Browsers: The browsers supported by JavaScript Boolean toString() Method are listed below:

  • Google Chrome
  • Internet Explorer
  • Mozilla Firefox
  • Safari
  • Opera



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