Comment Line
In the C programming language, a comment line is a line of code that is not executed by the compiler but is included in the source code to provide information and explanations for the human reader. Comments are ignored by the compiler during the compilation process, and they are used to make the code more understandable and maintainable.
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There are two primary ways to write comment lines in C:
1. Single-line comments:
Single-line comments are used for adding comments on a single line of code. In C, you can create single-line comments using two forward slashes (`//`). Everything after `//` on that line is considered a comment and is ignored by the compiler.
Here's an example:
// This is a single-line comment
int x = 10; // This line declares an integer variable 'x' and assigns it the value 10
In the above example, the text following `//` is a comment and does not affect the execution of the program.
2. Multi-line comments:
Multi-line comments are used when you want to add comments that span multiple lines of code. In C, you can create multi-line comments using the `/*` and `*/` delimiters. Everything between `/*` and `*/` is treated as a comment, and it can span multiple lines. Here's an example:
/*
* This is a multi-line comment
* It can span multiple lines
*/
int y = 20; /* This line declares an integer variable 'y' and assigns it the value 20 */
In the above example, the text between `/*` and `*/` is considered a comment, and it can provide more detailed explanations than single-line comments.
Comments are essential for documenting your code, making it easier for others (and yourself) to understand the purpose and functionality of your program. They are particularly useful for explaining complex logic, documenting function prototypes, providing information about variables, and giving credit to the authors of the code.
It's a good practice to include comments in your code to make it more readable and maintainable. However, it's also important not to over-comment or include redundant comments, as this can clutter the code and make it harder to read.
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