Find the Running Product
Calculate the partial product of a bunch of integers. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Find the Running Product
- 1. Paste your integers in order. Enter the sequence of integers in the order you want them multiplied, since the running product depends on the sequence order.
- 2. Choose a separator. Set Separator to control how the resulting running-product values are joined, such as a comma or newline, matching the format you need downstream.
- 3. Read the running products. The tool multiplies terms one at a time and outputs each partial product, starting with the first term and ending with the product of the whole sequence.
- 4. Copy the results. Copy the full list of running products from the output pane and paste it into a spreadsheet or script for further use.
When to use Find the Running Product
Find the Running Product shows every partial product as you multiply through a sequence of integers, not just the final total. It is useful whenever the intermediate values matter as much as the end result, such as tracking compounding growth step by step.
- Tracking compounding growth factors. You have a list of yearly growth multipliers like 1, 2, 3 representing simplified whole-number scaling and want to see the cumulative multiplier after each year.
- Verifying a factorial-style calculation. A sequence of consecutive integers should multiply into a factorial. Check the running product at each step to confirm the intermediate values match expectations.
- Debugging a cumulative multiply function. You are testing code that computes running products and want a trusted reference output to compare your function's results against, term by term.
- Building a probability tree example. A teaching example multiplies branch counts at each level of a tree. The running product shows the total number of paths after each additional level.
Examples
Running product of integers
Input
1, 2, 3, 4, 5
Output
1, 2, 6, 24, 120
A zero factor zeroes the rest
Input
5 0 3
Output
5, 0, 0
About the Find the Running Product tool
Find the Running Product is a free online tool that works entirely inside your web browser. Calculate the partial product of a bunch of integers. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 133 Integer utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with the Separator setting, and the result refreshes the moment you change it. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Find the Running Product cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.