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SQRT for Color Basic
From CoCopedia - The Tandy/Radio Shack Color Computer Wiki
Issue: Microcomputer NEWS, April 1981 V3N04 Pag.11
The Square Root function in standard Color BASIC (or should I say the lack of one). The RSC-4 catalog claimed a SQR function was available in standard Color BASIC, but it is only available in Extended Color BASIC. This being the case, here is a short subroutine you can use to figure square roots in your programs:
A = your number B = square root (A)
10 B=A/3 20 B=.5*(B+A/B) 30 C=B*B 35 C=INT(C*10000+.5)/10000 40 IF C<>A THEN GOTO 20
