for

Arbortext Command Language > Commands > for

for

for ( expression1; expression2; expression3 ) {command-list}

for ( $variable in $array ) {command-list}

The first form of this command evaluates expression1 and then executes the listed commands while expression2 is true. At the end of each iteration, executes expression3. This is equivalent to:

expression1 ; while (expression2) { command-list ; expression3 ;}

The second form of this command executes listed commands with the variable set to each subscript of the array. The subscripts are returned in order (from the lowest to the highest) for a normal array. If the array is associative, the subscripts are returned in arbitrary order. The command list must not contain another for ($variable in $array) statement over the same array.

Examples

# Display each of the variables in the
#array "$includes" on std out.
for ($i = 1; $i <= count($includes); $i++) {
eval "[$i], $includes[$i]" output=-;
}

# This alias creates a list of all valid tags
# in the current document:
tag_names($tags);
$list = " "
for ($i in $tags) {
$list .= delete($tags[$i]) . " "
}