سلام.
در زیر کد جواب سوال این جلسه را قرار میدهم.
'use strict'; function Person(name, age, height, wight) { name = name.charAt(0).toUpperCase() + name.substr(1,name.length); this.name = name; this.age = age; this.height = height; this.wight = wight; this.sayName = function () { return `Hi, my name is ${name}. I'm ${age} years old.` } this.BMI = function () { return wight / (height / 100) ^ 2; } } const amir = new Person('amir mahmood', 25, 178, 78); console.log(amir); console.log(amir.sayName()); console.log(amir.BMI());