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Jun 25th, 2018
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  1. print(2 + 8)
  2. print(3 - 5)
  3. print(4 * 2)
  4. print(16 / 8)
  5. print(19 / 5)
  6. // -> 10
  7. // -> -2
  8. // -> 8
  9. // -> 2
  10. // -> 3 答えは切り捨てになる
  11. let age = 19
  12. print("Hello" + " World")
  13. //print("123" + 123)
  14. print("Mike is " + String(age) + "years old")
  15. print("Mike is \(age)years old")
  16. // -> "Hello World"
  17. // -> エラー データの型(String & Int)が異なるので計算できない
  18. // -> Mike is 19years old 自分で型を合わせて代入
  19. // -> Mike is 19years old \(age)と書くことで勝手に型を合わせて足してくれる
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