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Instead of adding several almost equal lines in a script we can use loops to perform a task like this. In JavaScript there are two different kind of loops: for - loops through a block of code a specified number of times. while - loops through a block of code while a specified condition is true.
The Script task transparently manages locking as the script reads and modifies the values of variables. You can use the Contains method of the Variables collection returned by the Variables property to check for the existence of a variable before using it in your code.You can also use the VariableDispenser property (Dts.VariableDispenser) to work with variables in the Script task.When using the VariableDispenser, you must handle both the locking semantics and the casting of data types for variable values in your own code.ariables Example. The following example demonstrates how to access and use variables in a Script task to determine the path of package workflow. The sample assumes that you have created integer variables named CustomerCount and MaxRecordCount and added them to the ReadOnlyVariables collection in the Script Task Editor.