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Learn how to sum values accumulated in a for loop after the loop has finished executing in Robot Framework. This guide breaks down the process into easy steps.
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How to Sum Values Outside of a For Loop in Robot Framework Efficiently

In this post, we will address a common challenge faced by users of Robot Framework when dealing with loops and variable summation. If you've ever found yourself wondering how to sum up values generated inside a for loop after the loop completes, you're in the right place!

The Problem

When using loops in Robot Framework, it's common to perform actions multiple times and store results in a variable. For instance, you might execute a command to count elements and store that count in a variable x in each iteration.

Let's say you have a loop that runs twice:

In the first iteration, the count stored in x is 5.

In the second iteration, it is 2.

Now you want to find the total sum of x after both iterations. This is where things can get tricky, especially if you're not familiar with data structures available in Robot Framework.

The Solution

Step 1: Use a List to Store Results

Instead of attempting to store each result as an integer (which won't work for accumulation), we will use a list. This allows us to gather all results from each iteration.

Code Snippet

Here is how you can modify your existing code to effectively sum the results:

[[See Video to Reveal this Text or Code Snippet]]

Explanation:

Create List: We start by creating an empty list called ${results} to store the counts from each iteration.

Loop: The loop runs two times, counting elements each time and storing the result in x.

Log: This command logs the value of x for debugging purposes.

Append To List: Here we capture the value of x by appending it to ${results}.

Step 2: Sum the Values

Once you have all your values in the list, you can easily compute the sum using Python's built-in sum() function.

Code Snippet Continued

After your loop, add the following lines:

[[See Video to Reveal this Text or Code Snippet]]

Explanation:

Evaluate: This command evaluates the sum of the list ${results} using a generator expression. This approach is efficient and clean.

Logging the Sum: Finally, we log the resulting sum for clarity.

Conclusion

By following the steps outlined above, you can effectively sum up values generated within a for loop in Robot Framework. Using a list to store intermediate results simplifies your code and helps you maintain clarity.

Feel free to apply this method to your own Robot Framework scripts whenever you need to accumulate values across iterations! Happy scripting!