# The Ray Tracer Challenge: Magnitude of vector \[page 9\]

**URL:** <https://forum.devtalk.com/t/the-ray-tracer-challenge-magnitude-of-vector-page-9/218328>\
**Category:** PragProg Customers\
**Tags:** book-the-ray-tracer-challenge, suggestion\
**Created:** [11 October 2025 00:04 UTC](https://forum.devtalk.com/t/the-ray-tracer-challenge-magnitude-of-vector-page-9/218328 "2025-10-11T00:04:07Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Rukkie](https://forum.devtalk.com/letter_avatar_proxy/v4/letter/r/d78d45/32.png) [@Rukkie](https://forum.devtalk.com/u/Rukkie)\
**Post date:** [11 October 2025 00:04 UTC](https://forum.devtalk.com/t/the-ray-tracer-challenge-magnitude-of-vector-page-9/218328/1 "2025-10-11T00:04:07Z")

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2, 3, & 6 are nice numbers for this test and do not require the result to be expressed in the form of a square root:

**Scenario:** Computing the magnitude of vector(2, 3, 6)

**Given:** v ← vector(2, 3, 6)

**Then** magnitude(v) = 7