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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