How is a character represented in C language?

In C programming, when declaring a character variable, the `char` keyword is typically used. For example:

char ch = 'A';

In the above example, we declared a character variable `ch` and assigned it the value of the character ‘A’. Character data is enclosed in single quotes.

It is important to note that in the C language, character data is actually an integer type. Each character has a corresponding ASCII code value, so characters can be seen as integer values. Characters can be represented in integer form, such as:

char ch = 65; // 将字符'A'赋值给变量ch

At this point, the value of the variable `ch` will be the ASCII value of the character ‘A’.

In C language, there are numerous functions and operators for handling characters, such as `printf()` for printing characters, `scanf()` for reading characters, `toupper()` for converting characters to uppercase, `isalpha()` for determining if a character is a letter, and so on. These functions and operators make character manipulation in C language very convenient.