'find' statement and 'if' 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 else if

if expression
    statements
elseif expression
    statements
else
    statements
end