Editing D (programming language) (section)

===Example 1===
This example program prints its command line arguments. The <code>main</code> function is the entry point of a D program, and <code>args</code> is an array of strings representing the command line arguments. A <code>string</code> in D is an array of characters, represented by <code>immutable(char)[]</code>.

<syntaxhighlight lang="D" line highlight="3,5">
import std.stdio: writefln;

void main(string[] args) {
    foreach (i, arg; args)
        writefln("args[%d] = '%s'", i, arg);
}
</syntaxhighlight>

The <code>foreach</code> statement can iterate over any collection. In this case, it is producing a sequence of indexes (<code>i</code>) and values (<code>arg</code>) from the array <code>args</code>. The index <code>i</code> and the value <code>arg</code> have their types inferred from the type of the array <code>args</code>.