MATLAB

matlab if

for c = 1:ncols
    for r = 1:nrows
        
        if r == c
            A(r,c) = 2;
        elseif abs(r-c) == 1
            A(r,c) = -1;
        else
            A(r,c) = 0;
        end
        
    end
end

if statement in matlab

for c = 1:ncols
    for r = 1:nrows
        
        if r == c
            A(r,c) = 2;
        elseif abs(r-c) == 1
            A(r,c) = -1;
        else
            A(r,c) = 0;
        end
        
    end
end
A

matlab else if

if expression
    statements
elseif expression
    statements
else
    statements
end

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

if else in matlab

a = 100;
%check the boolean condition 
   if a == 10 
      % if condition is true then print the following 
      fprintf('Value of a is 10
' );
   elseif( a == 20 )
      % if else if condition is true 
      fprintf('Value of a is 20
' );
   elseif a == 30 
      % if else if condition is true  
      fprintf('Value of a is 30
' );
   else
      % if none of the conditions is true '
      fprintf('None of the values are matching
');
   fprintf('Exact value of a is: %d
', a );
   end

matlab if

if expression
    statements
elseif expression
    statements
else
    statements
end