Size of integers in CPLEX

Question

I tried searching quite a bit but could not find the answer. What is the size of integer variables in CPLEX? Is it 64-bit or is it arbitrary precision based on the bounds?

Answer 1

public  IloIntVar(IloEnv env, IloInt vmin=0, IloInt vmax=IloIntMax, const char * name=0)

The Max Value of an integer decision variable is IloIntMax

PS:

dvar int x;

subject to
{
  
}

execute
{
  writeln(x.UB);
}

gives the exact value

2147483647

Answer 2

code in in concert/include/ilconcert/ilosys.h

typedef __int64 IloInt;
typedef unsigned __int64 IloUInt;
typedef long IloInt;
typedef unsigned long IloUInt;
typedef double IloNum;
typedef float IloShortNum;
typedef IloInt IloBool;
typedef void* ILO_MAY_ALIAS IloAny;
typedef IloNum (*IloNumFunction)(IloNum);

IloNum is double

IloBool/IloInt both are long