About PiNumpad. The Natural Logarithm Of 2

PiNumpad is a free memory trainer for the natural logarithm of 2 (0.69314718055994...), the natural logarithm of 2, the area under the curve 1/x from 1 to 2. This page explains how the natural logarithm of 2 is implemented in the trainer, grouping logic, colour coding, and anything specific to this constant.

About this constant on PiNumpad. The About page explains how this particular constant is implemented in PiNumpad: how the digits are grouped, what the colour coding means, and any notes specific to this constant that differ from the others.

ln 2 governs the doubling time of exponentially growing systems, appears in information theory as the conversion between nats and bits, and is the alternating harmonic series sum. Check this page if you are new to PiNumpad and want to understand the grouping logic before you start, or if you are switching from another constant and want to understand the differences.

PiNumpad is designed for programmers, information theorists, finance students, and anyone who works with logarithms, algorithm complexity, or exponential models. It runs entirely in the browser with no account, no installation, and no cost. Progress is saved locally using your browser's storage.

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