Optional Binding With If Let

• this is the safest way to unwrap a value.

      
var parsedInt: Int? = 10

if let parsedInt = parsedInt {
 print(parsedInt)
}else{
 print("nil")
}

• this can also used to unwrap multiple values.

var parsedInt: Int? = nil

var parsedString: String? = " "


if let parsedInt = parsedInt,

 let parsedString = parsedString{

 print(parsedInt)

 print(parsedString)

}else{

 print("nil")

}