Using the Subtract action

Use the Subtract action to decrease the value in the Datetime variable by a specified time value and unit. For example, you can use this action to decrease the Datetime variable value by three hours or by three days.

过程

To subtract a value from a Datetime variable, do the following:

Double-click or drag the Subtract action from the Datetime node in the Actions palette.
Select an option from the Source date and time variable list to specify the variable that contains the value from which you want to subtract the time unit.
Enter the value you want to subtract in the Time value to add field.
Select an option from the Time unit to add list to specify the time unit you want to subtract.
Choose from the following time unit options:
- Milliseconds
- Seconds
- Minutes
- Hours
- Days
- Weeks
- Months
- Years
注： This action accounts for leap years. For example, if the action subtracts 31 days from March 31, 2020, the action output is February 29, 2020. Whereas, if the action subtracts 31 days from March 31, 2019, the action output is February 28, 2019.
Select the Datetime variable from the Assign the output to a variable list to specify the variable to which you want to assign the output.
Click Save.

后续步骤

To see the output value, convert the value in the Datetime variable to a String variable, then print the value with the Message Box action. For more information, see Using the To string action and Using the Message box action.

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