What does /* mean in C language?

The multi-line comment symbols in C language are / and /, which can comment on any line of content; nesting must be correctly matched; avoid using it in a string to prevent grammatical errors.

/*Usage in C language

In C language,/* and */ represent a pair of multi-line comment symbols.

Grammar structure:

/* 这是多行注释
在C语言中，以/*开始，以*/结束 */

Specific usage:

• Comment code: # Anything between ##/* and */ will be ignored by the compiler and no code will be generated. This can be used to comment, explain, or temporarily disable code.
• Nested comments: /* and */ can be nested, but they must match correctly. That is, each pair of /* must have a corresponding */.
• Avoid confusion with strings: Be careful not to use /* and */ within strings, as these symbols may also appear within string, this may result in syntax errors.

Example:

// 单行注释

/*
 * 这是一个
 * 多行注释
 */

int main() {
  /* 禁用以下代码 */
  printf("Hello, world!\n");
  /* 启用以下代码 */
  printf("Goodbye, world!\n");

  return 0;
}

In the above example:

• // represents a single line comment , will comment out the printf("Hello, world!\n"); line.
• /* and */ represent a multi-line comment, which will be commented out printf("Goodbye, world!\n"); OK.

Code can be easily commented to improve readability and maintainability by using

/* and */.

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