const class07Students = [];

function getNumberOfStudents() {
  const numberOfStudents = class07Students.length
  return numberOfStudents;
}

function addStudentToClass(studentName) {
    if (studentName === " ") {
        console.log("Please insert name")
    } else if ( numberOfStudents >= 5 && studentName.toLowerCase != "queen") {
        console.log("Can't add more student into class!");
    } else if  // find array name
      console.log(`${studentName} already in the class.`)
    } else {console.log(class07Students.push(studentName))}
  }
addStudentToClass("Alex");