The CHAR data type provides a performance boost because the database knows exactly how big every CHAR column will be and can make certain performance optimizations when reading or writing the data.

CHAR数据类型有助于性能提高，因为数据库确切地知道每个char列有多大，所以在读写数据时就可以执行某种性能优化。

youdao

If both values are of type CHAR, the result is also of type CHAR.

如果两个值都是char类型，结果还是char类型。

youdao

Thus, array (pointer (char), 4) is the type of arrays of 4 Pointers to char.

因此y的类型就是有四个元素、这些元素指向char类型的指针数组。

youdao

s1 I have a variable called s1 and it's char * of type char * so here we go.

我有一个变量,它的类型是。

哈佛公开课 - 计算机科学课程节选

String is actually not a data type in C. It actually is something called a char star and we'll come back to this before long.

字符串在C语言里其实不是一种数据类型,而是一种称为char，*的数据类型,这个知识点我以后会讲到。

哈佛公开课 - 计算机科学课程节选

I get the int and store it in n. The switch statement takes inside its parenthesis an int or a char or some primitive type.

我得到一个整数并把它存储,到n中，switch语句的圆括号里可以是一个整数,或者一个字符或其他的基本类型。

哈佛公开课 - 计算机科学课程节选