The variables i and j both initially have the value sqrt(-1)
for use in forming complex quantities. For example, the
expressions 3+2i, 3+2*i, 3+2i, 3+2*j and 3+2*sqrt(-1).
all have the same value. However, both i and j may be
assigned other values, often in FOR loops and as subscripts.
See also I .
Copyright (c) 1984-93 by The MathWorks, Inc.