Script Statements Scripting
DESCRIPTION
JANOS scripting supports most of the standard control structures. The syntax
are consistent with Standard C Language and PHP. Note that multiple statements
may be grouped into a single statement using curly braces { }. All forms of
commenting are available.
// Whitespace is ignored allowing you to format your code as you are
// accustomed to doing.
if (expr)
statement;
/ Statements are terminated with a semicolon ';' just like in the C
Language. In all of these constructs an individual statement may be
replaced with a group of statements enclosed in curly braces '{}'.
Format it according to your own standards.
/
if (expr) {
statement;
statement;
statement;
}
// In addition to the one-line C+ style comments the one line
// shell-style comment which starts with '#' can be used.
if (expr)
statement; # executed when expr is TRUE
else
statement;
# The elseif construct is supported
if (expr)
statement;
elseif (expr)
statement
else
statement; / default condition
/
// switch-case statements
switch (expr) {
case expr1:
statement;
statement;
break;
case expr2:
statement;
statement;
break;
default:
statement;
statement;
break;
}
while (expr)
statement;
// while-loops support single-level 'break' and 'continue'.
while {
if (expr)
break; // exit the loop early
statement;
}
// The do-while form is available.
do {
statement(s)
} while (expr);
/ The for-loop follows the C Language implementation.
/
for (expr1; expr2; expr3)
statement;
/ The foreach construct provides an easy way to iterate over arrays.
/
foreach (array_expression as $value)
statement;
foreach (array_expression as $key => $value)
statement;
/ 'echo' is a native constructs but 'print' is a function. The former
therefore does not require parentheses although if you like them
feel free to include them.
/
echo expr;
echo expr1, expr2, ... ;
echo(expr1, ...);
/ 'exit' (and its alias 'die') are also native constructs and not
functions. They therefore do not require parentheses either. With
these constructs once the expressions have been echoed the rendering
process terminates.
/
exit;
exit expr;
exit expr1, expr2, ... ;
exit (expr1, ...);
die;
die expr;
die expr1, expr2, ... ;
die (expr1, ...);
SEE ALSO
HELP Topics:
EXPRESSIONS,
FUNCTIONS,
VARIABLES,
SCRIPT
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