Notes
In Salesforce, there are two types of loops that can be defined in a flow:
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Loop: This loop is similar to a traditional "while" loop in programming. It repeats a set of actions until a specified condition is met. The loop will continue to execute until the specified condition evaluates to false.
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Fast Lookup loop: This loop is specific to Salesforce and is used to query a set of records and perform a set of actions on each record in the result set. It is called a "fast" loop because it queries all the records in a single batch, which can be faster than querying them one at a time. This loop is commonly used in automation processes to perform a series of actions on multiple records at once.
Both of these loops are available in Salesforce's Flow Builder, which is a tool for building custom flows that automate business processes. The choice of which loop to use depends on the specific requirements of the flow and the type of data being processed.