For Loop
Executes its subdiagram n times, where n is the value wired to the count (N) terminal. The iteration (i) terminal provides the current loop iteration count, which ranges from 0 to n-1.
After you create a For Loop, you can use shift registers to pass values from one iteration to the next. If you wire an array to a For Loop, you can read and process every element in that array by enabling auto-indexing. You also can enable auto-indexing by configuring a For Loop to return an array of every value generated by the loop.
You can add a conditional terminal to configure a For Loop to stop when a Boolean condition or an error occurs. A For Loop with a conditional terminal executes until the condition occurs or until all iterations complete, whichever happens first. To add a conditional terminal to a For Loop, right-click the For Loop border and select Conditional Terminal from the shortcut menu. You must wire the conditional terminal and either wire the count terminal or auto-index an input array for the loop to execute and for the VI to run.
For Loops produce default data when the iteration count is zero.