Submitted by Mikinak77 t3_zy5yuj in explainlikeimfive
RSA0 t1_j24rosr wrote
Reply to comment by Psyese in ELI5 How do calculators get the square root of random numbers? by Mikinak77
You don't need a table of squares. This method works, even if you don't start with a square. You just need to start as close as possible to the square root.
Even some crude approximation, like "closest power of 10", is enough for the initial value.
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