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Subtracting days from a date in apex

To subtract days from a Date variable, utilize the ApexaddDays() method with a negative number (representing the number of days to subtract).

Following is an example of subtracting three days from current date in apex.

In the above example:

The System.today() method is used to find the current date and assigned to the variable today.
The addDays() function is used with a negative parameter to find the third day before today.