پاسخ تمرین

// ---------- class Person ---------
function Person(namePerson, age, height, sex, weight, nationality) {
    this.names = namePerson[0].toUpperCase() + namePerson.substring(1); //convert first Letter to uppercase
    this.age = age;
    this.height = height;
    this.sex = sex;
    this.weight = weight;
    this.nationality = nationality;

    // -------- function to presentation in console --------
    this.presentation = function () {
        let pre = "My name is: " + this.names +"\n"+
                  "My age is: " + this.age +" year\n" +
                  "My height is: " + this.height +" cm\n" +
                  "My sex is: " + this.sex +"\n" +
                  "My weight is: " + this.weight +" kg\n" +
                  "My nationality is: " + this.nationality +"\n" +
                  "My BMI is: " + this.cal_BMI() +"\n" ;
        return pre;
    }
    // -------- function to calculator BMI --------
    this.cal_BMI = function () {
        return Math.round(this.weight / ((this.height/100)**2));  //  BMI = w(kg)/h(m)^2  --> height from cm to m
    }
}
let myPerson = new Person("mohammad", 29, 180, "men", 75, "iranian");
console.log(myPerson.presentation());