Square root any nonnegative number, then the principal square root of −"x" is The right side (as well as its negative) is indeed a square root of −"x", since For every non-zero complex number "z" there exist precisely two numbers "w" such that : the principal square root of "z" (defined below), and its negative. There are two complex numbers that square to a given arbitrary non-zero imaginary number formula_11 with real formula_12 where the two-digit pattern {3, 6} repeats over and over again in the partial denominators. Since , the above is also identical to the following generalized continued fractions: The
IBM System/36 BASIC program source code inaccessible and it is not reversible. Always save an unlocked copy before using LOCK. System/34 BASIC and System/36 BASIC are very similar; however, machine code incompatibility makes it impossible to port a subroutine member BASIC program between these systems. See also Square Root of 2 & PI π solution for solution published on mainframes during the 1980s & 1990s. IBM System/36 BASIC IBM System/36 BASIC was an interpreter for the IBM System/36 midrange computer. System/36 BASIC was first offered in 1983, and as such, contained many of the trappings that a BASIC program would have encountered in