# 疑问

- [模块概念历史](/language/swift/yi-wen/mo-kuai-gai-nian-li-shi.md)
- [swift编程语言去掉字符类型是否可以？](/language/swift/yi-wen/swift-bian-cheng-yu-yan-qu-diao-zi-fu-lei-xing-shi-fou-ke-yi.md)
- [let c = "A" ， 为什么不推断为character类型？](/language/swift/yi-wen/letc-a-wei-shen-me-bu-tui-duan-wei-character-lei-xing.md)