Control Flow
Decisions
Branching
Looping
if
if else
if else if else
switch
break
Use the break statement to exit a loop and resume the execution of the parent block. Break can be combined with a label to go to a specific loop.
continue
Use continue to skip an iteration of a loop and resume at the next iteration
return
Functions in Lucee can have multiple return values which can exit a function early for controlling flow.
for loop
for in loop
The for in construct can be used with for arrays, structs, and queries. Below is an example for arrays. For other examples, see:
Do While loop
While Loop
Loop Tag
The loop tag is an alternative style which has additional features for arrays, structs, queries and lists
See:
Looping with Labels
It is possible to break; out of loop and continue; loops and resume execution at particular lables. This is particularly useful when executing nested loops, and when breaking out of a child loop, wanting to continue execution at a parent, or after a parent.
For Loop with Label;
Nested For Loops with Labels
This exits out of the child loop and continues after the parent loop
Nested Loop tags with Label
Labels are also possible with loop tags using the label attribute
Nested Loop using Continue
While the previous examples used break; to exit the loop and resume after the label, its also possible to use continue, which results the next iteration of the loop, at the label:
The above sample would produce:
inner loop with 1
inner loop with 2
Top of loop with 2
inner loop with 1
inner loop with 2
Top of loop with 3
inner loop with 1
inner loop with 2
Top of loop with 4
inner loop with 1
inner loop with 2
Top of loop with 5
inner loop with 1
inner loop with 2
After loop
The sample example but with a break
, produces:
Top of loop with 1
inner loop with 1
inner loop with 2
After loop