This workflow demonstrates how to use currentRunIndex to get the running index.
Function node: This node generates mock data for the workflow. Replace it with the node whose data you want to split into batches.
SplitInBatches node: This node splits the data with the batch size equal to 1. Based on your use-case, set the value of the Batch Size.
IF node: This node checks the running index. If the running index equals 5 the node returns true and breaks the loop.
The node uses the expression {{$node["SplitInBatches"].context["currentRunIndex"];}}, which returns the running index.
Set node: This node prints a message Loop Ended. Based on your use-case, connect the false output of the IF node to the input of the node you want to execute if the condition is false.