MATLAB Function Reference

elseif

Conditionally execute statements

Syntax

if expression
      statements
elseif expression
      statements
end

Description

The elseif command conditionally executes statements.

if expression
      statements
elseif expression
      statements
end

The second block of statements executes if the first expression has any zero elements and the second expression has all nonzero elements. The expression is usually the result of

expression rop expression

where rop is ==, <, >, <=, >=, or ~=.

else if, with a space between the else and the if, differs from elseif, with no space. The former introduces a new, nested, if, which must have a matching end. The latter is used in a linear sequence of conditional statements with only one terminating end.

The two segments

if A                         if A
   x = a                          x = a
else                         elseif B
   if B                           x = b
      x = b                  elseif C
   else                           x = c
       if C                  else
          x = c                   x = d
       else                  end
           x = d
       end
   end
end

produce identical results. Exactly one of the four assignments to x is executed, depending upon the values of the three logical expressions, A, B, and C.

See Also

break, else, end, for, if, return, switch, while

else

end