Declaring and initializing variables in C

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In C, variables must be declared before they are used, and they can be initialized at the time of declaration. Here’s how you can declare and initialize variables in C:

1. Declaring a Variable

To declare a variable, you specify the type of the variable followed by its name:

int number;
float decimal;
char character;

2. Initializing a Variable

You can initialize a variable at the time of declaration by assigning it a value:

int number = 10;
float decimal = 3.14;
char character = 'A';

3. Multiple Declarations and Initializations

You can declare and initialize multiple variables of the same type in a single line:

int a = 5, b = 10, c = 15;
float x = 1.1, y = 2.2, z = 3.3;

4. Constant Variables

You can also declare variables as constants, which means their values cannot be changed after initialization:

const int constantNumber = 100;

Example Program

Here’s an example program that demonstrates variable declaration and initialization in C:

#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;
};

This program declares and initializes three variables (age, height, and grade) and prints their values.

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