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void SystemFunction_WRITELN(Program prg) {
            MemoryManagement fncMemory = new MemoryManagement(prg.memory);
            Variable resultVariable = new ReferenceVariable("result",
                    Type.UNKNOWN);
            ReferenceVariable[] params = new ReferenceVariable[1];
            params[0] = new ReferenceVariable("_str", PrimitiveType.STRING);
            for (Variable param : params) {
                if (fncMemory.variableExists(param, false)) {
                    log("[iSCAR] identifierRedeclared " + param.getIdentifier());
                } else {
                    fncMemory.addVariable(param);
                }
            }

            Function function = new SystemFunction_WRITELN("writeln", null,
                    fncMemory, params, resultVariable);
            if (prg.memory.functionExists(function, true)) {
                log("[iSCAR]  Already declared " + function);
            }
            prg.memory.addFunction(function);
        }
        
        class SystemFunction_WRITELN extends Function {

            /** Creates a new instance of SystemFunction_SIN */
            public SystemFunction_WRITELN(String name, Statement body,
                    MemoryManagement memory, ReferenceVariable[] params,
                    Variable result) {
                super(name, body, memory, params, result);
            }

            public void exec() throws InterpreterRuntimeException {
                log(paramAt(0).stringValue());
            }
        }