turning an integer into text with D

Try std.conv's to function:

int amount = 27
string caption = "Number in 'amount': " ~ to!string(amount);

import std.conv;

int amount = 27;
string caption = "Number in 'amount': " ~ to!string(amount);

alternatively, format:

import std.string;
string caption = format("Number in 'amount': %s.", amount);

import std.conv;
auto amount = 27;
auto caption = text("Number in 'amount': ", amount);

wtext and dtext are anothr variants which produce wstring and dstring reslts.