if true statement matlab code example

Example 1: matlab if statement

if r == c
  A(r,c) = 2;
elseif abs(r-c) ~= 1
  A(r,c) = -1;
else
  A(r,c) = 0;
end

Example 2: matlab if not true

~A

% or you can use:

not(A)

% in more complex statements, such as if's:

if ~(condition)
% logic
end