Understanding Variables in C

Variables in C hold data that we can use and manipulate. Here’s how to declare a variable in C:

// Declaring variables in C
int age = 25;      // integer variable
float height = 5.9; // float variable
char grade = 'A';   // character variable

Different types of variables hold different types of data, such as integers, floats, and characters.

Let's see an example where we declare and print different variable types:

#include <stdio.h>

int main() {
    int age = 25;
    float height = 5.9;
    char grade = 'A';

    printf("Age: %d\n", age);
    printf("Height: %.1f\n", height);
    printf("Grade: %c\n", grade);

    return 0;
}

Variables in C can be modified after declaration. Example:

#include <stdio.h>

int main() {
    int age = 25;
    age = age + 10;
    printf("Age in 10 years: %d\n", age);
    return 0;
}

• Variables store data that can be used and changed.
• Every variable has a specific data type (e.g., int, float, char).
• Variables must be declared before use.
• Variable values can be modified after declaration.