Loops/Continue: Difference between revisions

=={{header|Wren}}==

Wren does not currently have a ''continue'' keyword but, depending on the circumstances, I can think of four ways in which to work around its absence.

<lang ecmascript>// Invert the condition.

// OK for simple cases.

for (i in 1..10) {

System.write(i)

if (i%5 != 0) {

System.write(", ")

} else {

System.print()

}

}

System.print()

// Use a flag to indicate whether to continue or not.

// OK as a more general approach.

for (i in 1..10) {

System.write(i)

var cont = false

if (i%5 == 0) {

System.print()

cont = true

}

if (!cont) System.write(", ")

}

System.print()

// Break out of an inner infinite loop.

// Not good if you also need to use 'break' normally.

for (i in 1..10) {

while (true) {

System.write(i)

if (i%5 == 0) {

System.print()

break

}

System.write(", ")

break

}

}

System.print()

// Return from an inner closure.

// Heavy handed, other methods usually preferable.

for (i in 1..10) {

Fn.new {

System.write(i)

if (i%5 == 0) {

System.print()

return

}

System.write(", ")

}.call()

}</lang>

{{out}}

<pre>

1, 2, 3, 4, 5

6, 7, 8, 9, 10

1, 2, 3, 4, 5

6, 7, 8, 9, 10

1, 2, 3, 4, 5

6, 7, 8, 9, 10

1, 2, 3, 4, 5

6, 7, 8, 9, 10

</pre>