Implementation
Java

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Be useful.

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Please try to avoid dependencies to third-party libraries and frameworks.

Other implementations
import "fmt"
t := fmt.Sprintf("%s%d", s, i)
t = s + i.to_s
SysUtils
begin
  t := s + IntToStr(i);
end.
let t = format!("{}{}", s, i);
t = '{}{}'.format(s,i)
import std.conv : to;
string t = s ~ to!string(i);
import std.format : format;
string t = "%s%d".format(s, i);
t = s ++ show i
uses Sysutils;
t := s + i.ToString;
#include <string>
auto t = s + std::to_string (i);
$t = $s . $i;