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- import Foundation
- extension Double{
- mutating func increment (){
- self = self + 1
- }
- mutating func incrementBy (_ num: Double){
- self = self + num
- }
- }
- var d = 5.0;
- d.increment()
- print(d)
- d.incrementBy(100)
- print(d)
- // extension String{
- // mutating func unAlpahaBetee(_ st:String){
- // var i = 0
- // var n = st.count
- // print(n)
- // for i in 1...n {
- // print(st[i])
- // }
- // }
- // }
- // var s = "abn23k40$%^$"
- // s.unAlpahaBetee("a1111111111111bc")
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