Another way to think of this is the opposite of a do while loop. Do Until Loopĭo until loops are great when you need to perform a process until a result is achieved. #Vba increment variable code#This code will behave the same as my for loops, but requires one more line of code. I don’t have to initially declare i = 0 as the compiler will do that for me, but a big difference between a for loop and a do loop is that I have to increment the variable i during each do loop with a line of code. Sticking with our NameArr array we’ve used previously, we start a do while loop where we instruct it to loop while i is less than five. Let’s check out an example of the syntax: There are a lot of scenarios to use do while loops. Those objects could be cells that are populated with data (do while cell is not blank), files in a folder (do while file name does not equal nothing), or maybe on an API call (do while call returns data). I generally use this loop when I’m performing an action on a list of objects. Another way to say this would be, the loop will continue until the condition you set is evaluated as false. Do loops were very difficult for me when I first began writing code, I would often find myself in a do loop that would never end and would have to force quit Excel to get it to stop.Ī do while loop is a loop that will run as long as a condition is true. While not explicitly an Excel VBA for loop, I still want to cover do loops here. It’s important to note that the for each loop will start with the first item in the object and loop through each item in that object in order. Then the code is looping through each item (element) of the array and popping up a message window displaying the current name of the loop. This is a very simple Excel VBA for loop where I’ve created an array with five names. The reason for this is that this ensures that, no matter what size (number of data points) the object, this ensures I’m always performing the action(s) for each item in it. If I have a range, array, dictionary, or other data storage object that I’ve already declared and/or populated with data, and I need to do something to every piece of data within that object, I generally use a for each loop. The decision-making process I use when defining whether I want to use a for each loop, or a for loop, is pretty straight forward. You might have an array of data and need to perform some action for each element of the array. For example, you might use a for each loop to check the value of each cell in a range and do something if it meets certain criteria. This loop will perform an action for each item in a parent item. This is different than if you were looping through a range of cells, which will start with 1.Ī second Excel VBA for loop is the for each loop. I also want to point out that this loop will start with 0 because the first element in a VBA array will always be 0. However, it’s good practice to declare this on each for loop. You only need to have the Step declaration there if you want to increment i by something other than one on each loop. It’s worth noting that this code would run without “Step 1” since that is the default setting. The “Step 1” tells the loop to increment i by one on each run of the loop. In the for loop, we declare that, for each variable I we want to display the corresponding element of the array in a message box. We then populate this variable with an array of five names. To start, we declare the variable NameArr as variant. NameArr = Array("Bill", "Jane", "Joe", "Piper", "Logan")
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