Loops/Nested: Difference between revisions

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@@ Line 2,518: / Line 2,518: @@
 =={{header|Nim}}==
-<lang nim>import math, strutils
+<lang nim>import random, strutils
-const arrSize = 10
+const ArrSize = 10
-var a: array[0..arrSize-1, array[0..arrSize-1, int]]
+var a: array[ArrSize, array[ArrSize, int]]
-var s: string = ""
+var s = ""
-randomize()   # different results each time this runs
+randomize()   # Different results each time this runs.
+# Initialize using loops on items rather than indexes.
-for i in 0 .. arrSize-1:
-   for j in countup(0,arrSize-1):
+for row in a.mitems:
+  for item in row.mitems:
-      a[i][j] = random(20)+1
+    item = rand(1..20)
 block outer:
+  # Loop using indexes.
-   for i in countup(0,arrSize-1):
-      for j in 0 .. arrSize-1:
+  for i in 0..<ArrSize:
-         if a[i][j] < 10:
+    for j in 0..<ArrSize:
-            s.add(" ")
+      if a[i][j] < 10: s.add(' ')
-         addf(s,"$#",$a[i][j])
+      addf(s, "$#", $a[i][j])
-         if a[i][j] == 20:
+      if a[i][j] == 20: break outer
-            break outer
+      s.add(", ")
-         s.add(", ")
+    s.add('\n')
-      s.add("\n")
-echo(s)</lang>
+echo s</lang>
 {{out}}
 <pre> 9, 16,  3, 18,  4, 17,  2, 16,  7,  6,