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:
// 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. console.log(B); |
Output:
5
Errors and Exceptions:
Program 1: Here 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 be existed when date of the month given as 33 i.e, greater then 31.
// Creating a Date object var A = new Date('October 35, 1996 12:35:32'); var B = A.getHours(); // Printing hour. console.log(B); |
Output:
NaN
Program 2: If hours is not given, it returns zero (0). It is an exception case.
// Creating a Date object var A = new Date('October 12, 1996'); // extracting hours from the date object var B = A.getHours(); // Printing hour. console.log(B); |
Output:
0
Program 3: If nothing as parameter is given, it returns present hours.
// Creating a Date object var A = new Date(); var B = A.getHours(); // Printing present hour. console.log(B); |
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.
// Creating a Date object var A = new Date(); // Getting present Hour var B = A.getHours(); // Printing present hour. console.log(B); |
Output:
15
This article is attributed to GeeksforGeeks.org
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