Loops/Nested: Difference between revisions

=={{header|Wren}}==

{{libheader|Wren-fmt}}

Wren doesn't have ''goto'' or ''break label'' so to break out of nested loops you need to use a flag (''found'' in the code below).

<lang ecmascript>import "random" for Random

import "/fmt" for Fmt

var rand = Random.new()

var a = List.filled(20, null)

for (i in 0..19) {

a[i] = List.filled(20, 0)

for (j in 0..19) a[i][j] = rand.int(1, 21)

}

var found = false

for (i in 0..19) {

for (j in 0..19) {

System.write(Fmt.d(4, a[i][j]))

if (a[i][j] == 20) {

found = true

break

}

}

System.print()

if (found) break

}</lang>

{{out}}

Sample run:

<pre>

8 5 4 9 5 7 13 8 8 13 17 10 9 4 8 14 16 5 5 9

11 18 16 9 6 17 14 5 10 13 15 8 2 6 18 20

</pre>