String t = "%s%s".formatted(s, i);
t : String := s & Integer'Image (i);
auto t = s + std::to_string (i);
string t = s ~ to!string(i);
string t = "%s%d".format(s, i);
write (unit=t,fmt='(A,I0)') s, i
t := fmt.Sprintf("%s%d", s, i)
let t = format!("{}{}", s, i);
let t = format!("{s}{i}");