Variables in C

Variables memory mein ek location ko represent karte hain jahan hum data/value store karte hain, jise baad mein use kiya ja sakta hai. Programming mein variables bahut important hote hain kyunki ye program ke data ko manage karne mein help karte hain. Variables stack, heap ya static memory mein store ho sakte hain, jo programming language aur variable ke type par depend karta hai.

Variables

Variable ek storage location hoti memory mein jo ki kisi value ko hold karti hai. Ye value change ho sakti hai program ke execution time par.

Rules for Naming Variable

1. Variable name ke start mein (A-Z or a-z) or ek underscore _
2. Variable name mein letters, digit(0-9), aur underscore _
3. Variable name koi keyword nhi ho sakta (e.g., int, return)
4. Variable name case-sensitive hote hai (e.g., age aur Age alag hai)

Example of Variables in C:

#include <stdio.h>

int main() {
    int age = 20; // Integer variable
    float price = 99.99; // Floating point variable
    char grade = 'A'; // Character variable
    
    printf("Age: %d", age);
    printf("Price: %.2f", price);
    printf("Grade: %c", grade);
    return 0;
}