Creating a For Loop with Alternative Starting Index and Increment Value

Issue Details

• The index of a For Loop in LabVIEW always starts with zero and increments by one. Is there a way to start with a different number and increment that index by a number other than one?
• My LabVIEW For Loop index always starts at zero. Is there a way to change this?
• In each of my For Loop iterations, the index value increases by one. Can I change this?

Solution

To modify the value of a loop's index (either starting value or increment), it is necessary to implement your own algorithm programmatically.

The following code snippet is an example of one way to approach this:

Note: This image is a LabVIEW snippet, which includes LabVIEW code that you can reuse in your project. To use a snippet, right-click the image, save it to your computer, and drag the file onto your LabVIEW diagram.

To obtain a custom increment value (A), multiply the loop's index (i) by your required offset (Increment). For example, if the value of Increment is set to two, result A will take the form i+2. For the first five loop iterations, A will be 0,2,4,6,8...

A can be added to a custom start value (Start Value) to ensure that each loop iteration is correctly offset by your desired amount (result B). For example, if the loop is set to iterate 10 times, Start Value is set to three and Increment is set to two, the result B will be 3, 5, 7, 9, 11, 13, 15, 17, 19, 21.