Variable declaration in C language.

In C, a variable is a named storage location that holds a value. It is used to store and manipulate data within a program. Variables have a specific type that determines the range of values it can hold and the operations that can be performed on it.

Syntax for declaring a variable in C:

C
data_type variable_name;

Here, data_type represents the type of the variable, and variable_name is the name given to the variable. For example, to declare an integer variable named age, you would use the following syntax:

C
int age;

We can also initialize a variable at the time of declaration by assigning a value to it:

C
data_type variable_name = value;

Here's an example of declaring and initializing a few variables in C:

C
#include <stdio.h> 
int main() 
{
    
int age = 25;
    
float height = 1.75;
    
char grade = 'A';

    
printf("Age: %d\n", age);
    
printf("Height: %.2f\n", height);
    
printf("Grade: %c\n", grade);

    
return 0;

}

In this example, three variables are declared and initialized: age of type int, height of type float, and grade of type char. The values are then printed using printf statements.

Output:

C
Age: 25
Height: 1.75
Grade: A

Variables can be modified by assigning new values to them throughout the program, allowing for dynamic storage and manipulation of data.