This operator contains other VOP operators. The code for the contained operators is executed repeatedly in a loop until the specified condition is met.

Use this operator to repeat the same sequence of code many times. Be careful when using this operator to ensure that the condition will eventually be met. Otherwise an endless loop can result. Such endless loops can be interrupted within Houdini, but can result in renders that never finish.

Any value that you wish to modify inside the For Loop operator must be provided as an input. The outputs of the For Loop operator will contain the modified versions of the inputs once the loop exits. The actual values wired into the For Loop operator inputs are never modified, and so can be connected to other operators in the network, but remember that the values from these operators will always be the values unmodified by the For Loop operator.

The looping of this operator is always controlled by a simple counter. The While Loop VOP provides a more flexible construct that can be used to exit based on any condition, as opposed to using a simple counter.

All connected inputs mimic the properties of the output wired into them. They adopt the same help label and name as the output connected to them. If multiple outputs with the same name are connected, the names of the inputs are automatically incremented to make them unique.

The list of outputs depends on the inputs connected to the Subnet Output operator contained in this operator. The data type and name of each output will match the corresponding input of the Subnet Output operator.