new randomfbi[][] = {
"500",
"450",
};

if (strcmp("/becomefbi", cmdtext, true, 10) == 0)
  {
  if (GetPlayerScore(playerid) >= 1500)
  {
  SendClientMessage(playerid,0xFFFFFFFF,"You Are Now FBI!");
  SetPlayerSkin(playerid, randomfbi[random(sizeof(randomfbi))]);
  SetPlayerColor(playerid,COLOR_DARKBLUE);
  }
  else
  {
  SendClientMessage(playerid,0xFFFFFFFF,"You Need Atleast 1000 Score Point To Become FBI!");
  }

C:\Users\kalvi\Desktop\sa-mp\pawno\include\IsPlayerLAdmin.inc(15) : warning 219: local variable "name" shadows a variable at a preceding level
C:\Users\kalvi\Desktop\sa-mp\pawno\include\IsPlayerLAdmin.inc(32) : warning 219: local variable "name" shadows a variable at a preceding level
C:\Users\kalvi\Desktop\sa-mp\gamemodes\kfsr2.pwn(18) : error 029: invalid expression, assumed zero
C:\Users\kalvi\Desktop\sa-mp\gamemodes\kfsr2.pwn(18) : error 008: must be a constant expression; assumed zero
C:\Users\kalvi\Desktop\sa-mp\gamemodes\kfsr2.pwn(975) : warning 217: loose indentation
C:\Users\kalvi\Desktop\sa-mp\gamemodes\kfsr2.pwn(1105) : error 035: argument type mismatch (argument 2)
C:\Users\kalvi\Desktop\sa-mp\gamemodes\kfsr2.pwn(1524) : warning 203: symbol is never used: "gPlayerClass"
C:\Users\kalvi\Desktop\sa-mp\gamemodes\kfsr2.pwn(1524) : warning 203: symbol is never used: "gTeam"
Pawn compiler 3.2.3664	 	 	Copyright © 1997-2006, ITB CompuPhase


3 Errors.

new randomfbi[] = { // Why the last []? It are integers...
"500",
"450",
};