JavaScript | date.getHours() Function

The date.getHours() is an inbuilt function in JavaScript which is used to return the hours from a given Date object.

Syntax:

DateObject.getHours()

In the above syntax the DateObject is a valid Date object.

Parameter: This function does not takes any parameter. It is just used along with a Date Object from which we want to fetch Hours.

Return values: It returns the Hours for the given Date object. Hours is an integer value ranging from 0 to 23.

Below program illustrate the getHours() function:

  • Example 1:
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    <script>
      // Here a date has been assigned 
      // while creating Date object
      var A = new Date('October 15, 1996 05:35:32');
      
      // hour from above is being 
      // extracted using getHours()
      var B = A.getHours();
      
      // Printing hour.
      document.write(B);
    </script>

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    Output:

    5

Errors and Exceptions:

  • Example 1: Here the date of the month must lie in between 1 to 31 because no date can have month greater than 31. That is why it returns NaN i.e, Not a Number if the month in the Date object is greater than 31. Hours will not have existed when date of the month given as 33 i.e, greater than 31.
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    <script>
      // Creating a Date object
      var A = new Date('October 35, 1996 12:35:32');
      
      var B = A.getHours();
      
      // Printing hour.
      document.write(B);
    </script>

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    Output:

    NaN
  • example 2: If hours is not given, it returns zero (0). It is an exception case.
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    <script>
      // Creating a Date object
      var A = new Date('October 12, 1996');
      
      // extracting hours from the date object
      var B = A.getHours();
      
      // Printing hour.
      document.write(B);
    </script>

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    Output:

    0
  • Example 3: If nothing as parameter is given, it returns present hours.
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    <script>
      // Creating a Date object
      var A = new Date();
      
      var B = A.getHours();
      
      // Printing present hour.
      document.write(B);
    </script>

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    Output:

    15

Application: It has many applications such as getting current hour. Below program shows one of the application of this function. It gives the current Hour.

  • Example 1:
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    <script>
      // Creating a Date object
      var A = new Date();
      
      // Getting present Hour
      var B = A.getHours();
      
      // Printing present hour.
      document.write(B);
    </script>

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    Output:

    15

Supported Browsers: The browsers supported by JavaScript date.getHours() Function are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefix
  • Opera
  • Safari


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Improved By : Akanksha_Rai