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See the recommended documentation of this function
if then else
conditional execution
Calling Sequence
if expr1 then statements elseif expri then statements .... else statements end
Description
The if
statement evaluates a logical expression and executes a group
of statements when the expression is true.
The expri
are expressions with numeric or boolean
values. If expri
are matrix valued the condition is true only if
all matrix entries are true or different from zero.
The optional elseif
and else
provide for the
execution of alternate groups of statements. An end
keyword,
which matches the if
, terminates the last group of
statements. The line structure given above is not significant, the
only constraint is that each then
keyword must be on the same
line as its corresponding if
or elseif
keyword.
The keyword then
can be replaced by a carriage return or a
comma.
Warning: the number of characters used to define the body of any conditionnal instruction (if while for or select/case) must be limited to 16k.
Examples
i=2 for j = 1:3, if i == j then a(i,j) = 2; elseif abs(i-j) == 1 then a(i,j) = -1; else a(i,j) = 0; end, end
See Also
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