How to define legal character constants in C language?

There are two forms of data representation in C language: one is constant and the other is variable. As the name suggests, constants are data that remain unchanged, and variables are data with variable values!

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Let's take a look at how to define legal character constants in C language:

In C language , a character constant represents a character in the ASCII character set. The character constant occupies 4 bytes in the memory and stores the ASCII code (integer data) of the character.

In C language, a character constant represents a character in the ASCII character set. In the program, a character is enclosed in single quotes as a character constant. Uppercase and lowercase letters represent different word constants; so do spaces in single quotes; character constants can only contain one character; character constants can only be enclosed in parentheses.

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