how to get the time in hour from datetime in swift 5 code example

Example 1: swift get current hour

let date = Date() // save date, so all components use the same date
let calendar = Calendar.current // or e.g. Calendar(identifier: .persian)

let hour = calendar.component(.hour, from: date)
let minute = calendar.component(.minute, from: date)
let second = calendar.component(.second, from: date)

Example 2: swift get current hour

let hour = Calendar.current.component(.hour, from: Date())