SWIFT

define struct swift

Struct : Value Type | No Inheritance | No Deinitializers | No Type casting
Class : Reference Type | Inheritance supported | Has Deinitializers | Type casting

Common factors between struct and class:
Both allows to define properties to store values
Both allows to define methods
Both allows to define subscripts 
Both allows to define initializers
Both allows extension and protocols 

Function Inside Swift Struct

struct Car {

  var gear = 0

  // method inside struct
  func applyBrake(){
  print("Applying Hydraulic Brakes")
  }
}

// create an instance 
var car1 = Car()

car1.gear = 5

print("Gear Number: (car1.gear)")
// access method
car1.applyBrake()