How Do You Calculate Square Root?

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w3tw1lly
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Just bored and decided I want to make my own little calculator on my computer. What is the method for finding the square root of an input number?
 
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To find the sqrt of a

x'=(a/x+x)/2

iterate.

Have fun.
 
Thanks, I appreciate it. Sorry it was such a bad question:shy:.
 
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