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--- at:tutorial:basic [2011/05/23 13:38] – added tvcutsem
+++ at:tutorial:basic [2020/02/09 21:39] – elisag
@@ Line 1: / Line 1: @@
 ====== Functional and Imperative Programming ======
@@ Line 67: / Line 66: @@
 >>[1, [1, 2, ["a", "e", "i", "o", "u"], 4, 5], "ambientTalk"]
 </code>
 ==== Table Splicing ====
@@ Line 85: / Line 85: @@
 >>[2, 3, 4]
 </code>
+==== Multidimensional tables ====
+As mentioned before, there is no special constructor for definition of multidimensional tables, a table entry can contain another table. In what follows we have a closer look to manipulations with multidimensional tables.  Consider a multidimensional table which is extensionally defined as follows:
+<code>
+def a := [[1,0,0], [0,1,0], [0,0,1]];
+>>[[1, 0, 0], [0, 1, 0], [0, 0, 1]]
+>a[1][2]
+>>0
+>a[1]
+>>[1, 0, 0]
+>(a[1])[2] := 3;
+>>3
+>a
+>>[[1, 3, 0], [0, 1, 0], [0, 0, 1]]
+</code>
+An implicit definition of the same table can be expressed as follows:
+<code>
+def i := 0;
+def aux[3] {0};
+def b[3] { i := i + 1; aux := [0,0,0]; aux[i] :=1; aux};
+>>[[1, 0, 0], [0, 1, 0], [0, 0, 1]]
+</code>
 ===== Functions =====
@@ Line 297: / Line 335: @@
 The basic data types in AmbientTalk are numbers (i.e. integers), fractions (i.e. double precision floating point numbers), text (i.e. strings), tables (i.e. arrays) and booleans. In fact, instances of these data types are nothing but objects and as such, they respond to a variety of native methods. Objects will be the subject of the next chapter of the tutorial. This section explains the basic data types and includes some examples how to manipulate them. The complete list of methods can be found in the language reference.
 ==== Numerical data types ====
@@ Line 329: / Line 369: @@
 Numbers also support some useful iterator methods such as:
 <code>
->6.to: 0 step: 2 do: { |i| system.println(i) }
+>1.to: 5 do: { |i| system.println(i)}
+
+
+
+
+
+>1.to: 5 step: 2 do: { |i| system.println(i)}
+
+
+
+>6.downTo: 0 step: 2 do: { |i| system.println(i) }
 >>nil
 >3.doTimes: { |i| system.println(i) }
@@ Line 439: / Line 490: @@
 ===== Control Flow Constructs =====
-Control flow constructs are defined in the lexical root of AmbientTalk. The lexical root is an object containing globally visible native methods (i.e. it is the top-level environment). We have already seen in the previous sections examples of use of the foreach and if/then structures. A list of traditional control flow structures defined in AmbientTalk is shown below:
+Control flow constructs are defined in the "lexical root". The lexical root is an object containing globally visible native methods (i.e. it is the top-level environment). We have already seen in the previous sections examples of use of the foreach and ''if:then:'' control structures. A list of traditional control flow structures defined in AmbientTalk is shown below:
 <code>
 if: booleanCondition then: consequentClosure