elseif

Purpose

Conditionally execute statements.

Synopsis

if expression
    statements
elseif expression
    statements
end

Description

elseif 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 following two segments 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.

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

See Also

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

(c) Copyright 1994 by The MathWorks, Inc.