在程式設計中，有許多關鍵字扮演著重要的角色。其中包含有關資料型態的 int、float、char，以及控制流程的 if、else、while、for。除此之外，還有處理多重情況的 switch 和 case 關鍵字，以及用來終止迴圈或選擇結構的 break 關鍵字。另外，程式設計中也常會遇到 continue 用來跳過迴圈中的某些迴圈、return 用來返回函數值、以及 void 來表示函數無返回值。
在物件導向程式設計中，我們會用到 const 來定義常數、static 來宣告靜態變數或函數、struct 和 class 來定義自定義的資料結構、以及 new 和 delete 來動態分配和釋放記憶體。此外，我們也要記得使用 true 和 false 來表示布林型態的真和假、include 來引用其他檔案、以及 namespace 和 using 來管理名稱空間。
在物件導向程式設計中，我們還會用到 friend 來定義友元函數或類、public、private、protected 來限制成員的訪問權限，以及 virtual 和 override 來設計虛擬函數。最後，我們也會使用 operator 來進行運算子重載，以達到更彈性的程式設計。
Keywords: Keywords in Programming, Title: Important Keywords in Programming, Article:
In programming, there are many keywords that play important roles. These include data types such as int, float, char, as well as control flow keywords like if, else, while, for. In addition, there are also keywords for handling multiple scenarios like switch and case, and the keyword break for terminating loops or switch statements. Furthermore, programmers often encounter keywords like continue for skipping iterations in a loop, return for returning function values, and void to indicate functions with no return value.
In object-oriented programming, constants are defined using const, static is used to declare static variables or functions, struct and class are used to define custom data structures, and new and delete are used for dynamic memory allocation and deallocation. Additionally, true and false are used to represent boolean values true and false, include is used to reference other files, and namespace and using are used to manage namespaces.
In object-oriented programming, keywords like friend are used to define friend functions or classes, public, private, and protected are used to limit access to members, and virtual and override are used to design virtual functions. Lastly, operators are used for operator overloading to achieve more flexible programming.
（本文章僅就題目要求進行撰寫，不代表任何觀點或意見）
