Day 1: Understanding Tokens in C Programming ??

In C, a token is the smallest building block of a program, making up the language’s foundation. Think of it as the alphabet that the compiler understands to make sense of your code.

Types of Tokens in C

1. Keywords: Reserved words like int, return, and if that have specific meanings and can't be redefined.

2. Identifiers: Custom names for variables, functions, or arrays. For example

int age = 25; // 'age' is an identifier.         

3. Constants: Fixed values like numbers or characters. Example:

   const float PI = 3.14; // PI is a constant.        

4. Strings: Arrays of characters ending with a null character (`\0`). Example:

   char name[] = "Hello, World!";        

5. Special Symbols: Symbols like {, }, [], and # that have specific roles in the program structure.

6. Operators: Symbols that perform operations on variables. Example:

   int sum = a + b; // '+' is an operator.        

Why Tokens Matter?

Without tokens, there’s no meaningful way to write or understand a program. They’re like words in a sentence – essential for communication!

?? Example Code:

#include <stdio.h>  
int main() {  
    const int MAX = 10; // Token examples: 'const', 'int', '=', ';'  
    int sum = 0;  

    for (int i = 0; i < MAX; i++) { // Tokens: 'for', 'int', '<', '++'  
        sum += i; // Tokens: '+='  
    }  

    printf("Sum is: %d\n", sum); // Tokens: 'printf', '(', ')'  

    return 0;  
}          

Tokens are the foundation of every C program, whether simple or complex. Keep exploring them as you learn more about C! ??

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