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C FunctionsC Advantages of Using FunctionsC Function PrototypeC Basic Function DesignsC Programs Using FunctionsC ScopeC Local Variable and Global VariableWhy int main() return 03 Place to declare functionsC RecursionC Base Condition in RecursionC Iteration vs RecursionC Stack Overflow Error in RecursionC Nested functionsC Variable Length Number of ArgumentsC Parameter Passing – Call by value and Call by RefC Passing Strings to FunctionsImplementation of square() functionImplementation of factorial() functionImplementation of pow(x, n) functionImplementation of reverse(int) functionImplementation of countDigits(int) functionImplementation of palindrome(int) functionImplementation of primeNumber(int) function  C - Functions Practice Test.1  C - Functions Practice Test.2
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Strings in CStoring StringsC The String DelimiterC String Literals (String Constants)C Strings vs. CharactersC Declaring and Initialization of StringsC Strings and the Assignment OperatorC String Input Functions / Reading StringsC String Output Functions / Writing StringsC fscanf() and fprintf() FunctionsC Single Character Library FunctionsC String Manipulation Library FunctionsC Programs Using Character ArraysC Array of StringsC Programs Using Array of Strings  C - Strings Practice Test.1  C - Strings Practice Test.2
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C Comments

Comments in C are used to provide explanatory or descriptive notes within the source code. Comments are not executed by the compiler; instead, they serve as documentation for programmers to understand the code better. C provides two types of comments:

1. Single-Line Comments: Single-line comments are used to add comments on a single line. They start with // and continue until the end of the line. Anything following // on the same line is treated as a comment and is not compiled. 


// This is a single-line comment
int x = 5; // You can also add a comment at the end of a line of code

2. Multi-Line Comments: Multi-line comments are used to add comments that span multiple lines. They start with /* and end with */. Everything between these delimiters is treated as a comment and is ignored by the compiler. 


/*
 This is a multi-line comment.
 You can write comments on multiple lines here.
*/
int y = 10;

Comments are important for several reasons:

  • Documentation: They provide information about the code's purpose, behavior, and usage. This makes it easier for other programmers (and your future self) to understand and work with the code.
  • Debugging: Comments can help you debug code by providing context and explanations. You can comment out code that you suspect is causing issues to temporarily disable it without deleting it.
  • Maintainability: Over time, code may need updates or modifications. Comments help developers understand the code's logic, making it easier to maintain and extend.
  • Communication: Comments can serve as a form of communication among team members working on a project, explaining why certain decisions were made or how specific parts of the code work.

Here's an example that demonstrates the use of comments in C: 


#include 

int main() {
    // Initialize variables
    int x = 5;
    int y = 10;

    /* Calculate and print the sum */
    int sum = x + y;
    printf("The sum of %d and %d is %d\n", x, y, sum);

    return 0; // Return 0 to indicate successful execution
}

In this example, comments are used to describe the purpose of variables, the calculation, and the program's return value. These comments make the code more understandable and maintainable.

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