Memory Management in C

When you store data in a program (like variables or arrays), that data is kept in RAM (Random Access Memory) while the program is running. But once you close the program, all the data is lost because RAM is temporary storage.

For example:

#include <stdio.h>

int main() {
    int age;
    printf("Enter your age: ");
    scanf("%d", &age);
    printf("Your age is: %d\n", age);
    return 0;
}

👉 If you run this program and enter 21, it will display Your age is: 21.
👉 But if you close the program and reopen it, the age will be gone because it was stored in memory (RAM) temporarily.

How File Handling Helps?

To store data permanently, we use files on a hard drive instead of RAM. When we write data to a file, we can open the file later and retrieve the data, even after the program is closed. This is why file handling is important—it allows us to store and retrieve data across multiple program runs.