# IBM Visualization Data Explorer User's Reference

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### ForEachN

Category

Flow Control

Function

Iterates through the specified set of integers.

Syntax

    current, last = ForEachN(start, end, delta);

Inputs

Name | Type | Default | Description
--- | --- | --- | ---
`start` | integer | none | value of the first integer through the loop
`end` | integer | none | value of the last integer through the loop
`delta` | integer | 1 | numerical interval between successive integers output by the loop

Outputs

Name | Type | Description
--- | --- | ---
`current` | integer | the current integer
`last` | flag | status of loop

Functional Details

This module initiates an iteration for each integer in the set unless execution is terminated earlier by Done. Its function is similar to that of a "for" in standard programming languages. In the user interface, this module would usually be part of a macro, and only the contents of the macro would be executed for each iteration of the loop. If this module is placed in the top level visual program, the entire program will be executed during the loop.

Typically, loops are initiated with ForEachMember or ForEachN, although they can also be implemented with a Get/Set pair and Done.

Note: If this module is used in the scripting language, the results are defined only if they are used inside a macro.

`start` | is the value of the first integer of the loop
`end` | is the value of the last integer of the loop
`delta` | is the interval between successive integers of the loop

This module has two outputs:

`current` | is the value of the integer currently being iterated.
`last` | is a flag indicating whether or not this is the last iteration through the loop.

Example Macro and Program

    FactorialMacro.net
    Factorial.net

See Also

Done, First, ForEachMember, GetGlobal, GetLocal, SetGlobal, SetLocal

Chapter 4. "Data Explorer Execution Model" in IBM Visualization Data Explorer User's Guide.

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