Initial data commit

Task/Conditional-structures/Zkl/conditional-structures.zkl

@@ -0,0 +1,13 @@
+if (x) y else z;
+if(a)b else if (c) else d; etc
+x:=(if (a) b else c);
+
+a and b or c  // usually the same as if(a) b else c, beware if b evals to False
+
+switch(x){
+  case(1){...}
+  case("2"){...}  // matches anything
+  case(a)[fallthrough]{...}  // no break, no break has to be explicit
+  case(b){...}
+  else {...} // case a C's default, has to be at the end
+}