List Expression Extractor
Free online tool to extract items from a list using mathematical expressions.
Tool Guide
Introduction
The Online Rule-Based List Item Extractor quickly extracts list items that match a condition based on an expression such as 2*n+1. It supports common operators including addition, subtraction, multiplication, and division.
Please use n as the variable. Starting from 0, n is evaluated in sequence, and matching list items are extracted.
Common expressions:
Odd items: 2*n+1
Even items: 2*n
Note: The multiplication sign * must always be written explicitly.