Access variable from retrieveMultipleRecords().then and use it outside the function

Hello I'm using retrieveMultipleRecords to get some records from another table I'm using the data I'm getting and putting it into a variable I want to access that variable outside of the retrieveMultipleRecords function but I cant

this is my js code

window.parent.Xrm.WebApi.retrieveMultipleRecords("zs_resultat", fetchXMLResultats).then(

                                  functionsuccess(resultresultats) {

                                    for (var q = 0; q < resultresultats.entities.length; q++){


                                        json+='        {\n            "level":'+resultresultats.entities[q].zs_numero+',\n'
                                        json+='           "min":'+resultresultats.entities[q].zs_bornemin+',\n'
                                        json+='           "max":'+resultresultats.entities[q].zs_bornemax+',\n'
                                        json+='            "label": {\n'+resultresultats.entities[q].zs_jsonlabelresultat+'\n            },'
                                        json+='            "description": {\n'+resultresultats.entities[q].zs_jsondescresultat+'\n            },\n        }'if(resultresultats.entities.length-q>1){
                                            json+=','
                                        }


                                    }

                                    
                                  },
                                  function (error) {
                                      console.log(error.message);
                                      // end resultat
                                  }
                                );


////I want to use the variable 'json' here please how can I do that