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See the recommended documentation of this function
if
keyword for conditional execution
Calling Sequence
if expr1 then statements elseif expri then statements .... else statements end
Arguments
- expr1, expri
logical expressions
- statements
blocks of valid statements.
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
is a non-scalar value then the condition is true only if
all entries of this value 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 of if
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.
According to the Code Conventions for the Scilab Programming Language it is recommended:
Start each statement on a new line.
Write no more than one simple statement per line.
Break compound statements over multiple lines.
For example, use:
rather than
Warning: the number of characters used to define the body of any conditional 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
- try — beginning of try block in try-catch control instruction
- while — while keyword
- select — select keyword
- boolean — Scilab Objects, boolean variables and operators & | ~
- end — end keyword
- then — keyword in control flows 'if' and 'select'
- else — keyword in if-then-else and select-case-then-else
- comparison — comparison, relational operators
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