JavaScript | date.setDate() function

The date.setDate() is an inbuilt function in JavaScript which is used to set date of a month into a date object which are created using date() constructor.
Syntax:

dateObj.setDate(date_Value);

DateObj is a valid Date object created using Date() constructor in which we want to set the date of a month.

Parameter: Here parameter is date_Value i.e, the value of date which is used to set in date() constructor.
Return values: It returns the new i.e updated date of the month which is set by setDate() function. The date of the month is an integer value ranging from 1 to 31.

Output:

15

Errors and Exceptions

• Example 1: Here as we know that date of the month lies in between 1 to 31 but if we suppose to set date of 33, it will set date 2 for the next month because and this date 2 becomes date for next of the previous month.
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  <script> // Here a date has been assigned // while creating Date object var dateobj = new Date('October 13, 1996 05:35:32');    // new date 33 of the month is being set in above Date // Object with the help of setDate() function dateobj.setDate(33);    // new date of the month from above Date Object is // being extracted using getDate() var B = dateobj.getDate();    // new month from above Date Object is // being extracted using getMonth() var C = dateobj.getMonth();    // Printing new date of the month document.write(B);    // Printing new month document.write(C); </script>

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  Output:

  2
  10

  In above output 2 is date of the November month and 10 is the month of November because month name start from 0 to 11 i.e, 0 for January and 11 for December.

• Example 2: If in Date() constructor we do not give any date of the month, still setDate() function set new date which is given as its parameter.
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  <script> // Here date has not been assigned // while creating Date object var dateobj = new Date('October, 1996 05:35:32');    // new date 12 of the month is being set in above Date // Object with the help of setDate() function dateobj.setDate(12);    // new date of the month from above Date Object is // being extracted using getDate() var B = dateobj.getDate();    // Printing new date of the month document.write(B); </script>

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  Output:

  12
  

• Example 3: If nothing as parameter is given in Date() constructor, still setDate() function set date but month becomes current month.
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  <script> // Here a date has been assigned // while creating Date object var dateobj = new Date();    // new date 13 of the month is being set in above Date // Object with the help of setDate() function dateobj.setDate(13);    // date of the month from above Date Object is // being extracted using getDate() var B = dateobj.getDate();    // month from above Date Object is // being extracted using getMonth() var C = dateobj.getMonth();    // Printing new date of the month document.write(B + "<br>");    // Printing new month document.write(C);                   </script>

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  Output:

  13
  2
  

• Example 4: If new date of the month set to zero (0), the new date will be set to the last day of the previous month.
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  <script> // Here a date has been assigned // while creating Date object var dateobj = new Date('October 13, 1996 05:35:32');    // new date 0 of the month is being set in above Date // Object with the help of setDate() function dateobj.setDate(0);    // date of the month from above Date Object is // being extracted using getDate() var B = dateobj.getDate();    // month from above Date Object is // being extracted using getMonth() var C = dateobj.getMonth();    // Printing new date of the month document.write(B + "<br>");    // Printing new month document.write(C); </script>

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  Output:

  30
  8
  

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

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

Kanchan_Ray

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