What does C language char mean?

char is the data type that stores a single character in C language, occupying 1 byte of memory, with a value range of -128~127, and the default value is '\0' (empty character). It can be used to store and manipulate individual characters, but cannot directly store strings or Unicode characters, and cannot be compared directly with strings.

char type in C language

What is char?

char is a data type in C language that stores a single character.

Features:

• Size: Each char variable occupies 1 byte of memory space.
• Value range: The char type can store any ASCII code or extend ASCII code characters (-128 to 127 or 0 to 255).
• Default value: The default value of the uninitialized char variable is '\0', indicating an empty character.
• Character constants: Constants of type char are enclosed in single quotes, such as 'a'.

usage:

The char type variable is used to store and manipulate single characters, for example:

 <code class="c">char letter = 'A'; // 存储大写字母A char digit = '5'; // 存储数字5 char symbol = ' '; // 存储加号符号</code>

Type conversion:

The char type can be type-converted with other integer types (such as int, long), for example:

 <code class="c">int number = (int)letter; // 将字母A 转换为数字65</code>

Notes:

• The char type can only store a single character and cannot store strings.
• The char type cannot directly store Unicode characters.
• Avoid directly comparing the char variable to a string, because the string is an array of characters and char is a single character.

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