Initial data commit

Task/Substring/D/substring.d

@@ -0,0 +1,18 @@
+import std.stdio, std.string;
+
+void main() {
+    const s = "the quick brown fox jumps over the lazy dog";
+    enum n = 5, m = 3;
+
+    writeln(s[n .. n + m]);
+
+    writeln(s[n .. $]);
+
+    writeln(s[0 .. $ - 1]);
+
+    const i = s.indexOf("q");
+    writeln(s[i .. i + m]);
+
+    const j = s.indexOf("qu");
+    writeln(s[j .. j + m]);
+}