This example demonstrates how D3’s pie layout transforms tabular CSV data into pie-slice geometry by attaching computed `startAngle` and `endAngle` properties to each data point. The visualization reads `religionWorldTotals.csv`, which contains population figures for world religions, and configures the pie layout to use the `population` column as the slice-sizing value. The code uses `d3.layout.pie()` and `pie.value()` to define the angle mapping, then renders the resulting array as formatted JSON into a `<pre>` element for inspection. It relies on the D3 library (version 3.5.5) loaded from a CDN, and the data is parsed with a custom `type` function that coerces numeric strings.