Code:
if you are using amx modx v1.8.3 or highter then use fmt
get_user_info(iPlayers[iNum], fmt( "'%d'ate", a ), UserRate, 8);
Or use this way
formatex(MsgOnMotd, 499, "Name: %s | Rate %d%s | Cmd: %s | Upd: %s | Interp: %s", UserName, a, UserRate, UserCmdRate, UserUpdRate, UserInterp);
if you means u want to add the number as string then use num_to_str
new szNum[ 10 ];
num_to_str( a, szNum, charsmax( szNum) )
get_user_info(iPlayers[iNum], fmt( "'%s'ate", szNum ), UserRate, 8);