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FreeMat
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Section: Flow Control
The if and else statements form a control structure for conditional execution. The general syntax involves an if test, followed by zero or more elseif clauses, and finally an optional else clause:
if conditional_expression_1
statements_1
elseif conditional_expression_2
statements_2
elseif conditional_expresiion_3
statements_3
...
else
statements_N
end
Note that a conditional expression is considered true if the real part of the result of the expression contains all non-zero elements (this strange convention is adopted for compatibility with MATLAB).
Here is an example of a function that uses an if statement
if_test.m
function c = if_test(a)
if (a == 1)
c = 'one';
elseif (a==2)
c = 'two';
elseif (a==3)
c = 'three';
else
c = 'something else';
end
Some examples of if_test in action:
--> if_test(1) ans = one --> if_test(2) ans = two --> if_test(3) ans = three --> if_test(pi) ans = something else