In C programming, the ‘int’ keyword is a fundamental building block for working with integer data types. This article provides a comprehensive explanation of the ‘int’ keyword, its role in defining integer variables, and includes real-world examples with outputs to illustrate its significance in handling whole numbers efficiently.

**Understanding the ‘int’ Keyword**

The ‘int’ keyword in C is used to declare integer variables, allowing programmers to work with whole numbers. ‘int’ variables can store both positive and negative integers, providing a versatile way to handle a wide range of numerical data.

**Syntax for Declaring ‘int’ Variables:**

```
int variable_name;
```

**Example 1: Declaring and Using ‘int’ Variables**

```
#include <stdio.h>
int main() {
int number1, number2, sum;
number1 = 10;
number2 = 5;
sum = number1 + number2;
printf("The sum of %d and %d is %d\n", number1, number2, sum);
return 0;
}
```

**Output:**

```
The sum of 10 and 5 is 15
```

In this example, ‘int’ variables `number1`

, `number2`

, and `sum`

are declared and used to perform arithmetic operations. The result is displayed using `printf()`

.

**Storage of ‘int’ Data**

The ‘int’ data type typically occupies 4 bytes of memory on most systems, allowing it to represent a wide range of integer values, depending on the system’s architecture.

**Example 2: Maximum and Minimum Values of ‘int’**

```
#include <stdio.h>
#include <limits.h>
int main() {
printf("The maximum value of an 'int' is %d\n", INT_MAX);
printf("The minimum value of an 'int' is %d\n", INT_MIN);
return 0;
}
```

**Output:**

```
The maximum value of an 'int' is 2147483647
The minimum value of an 'int' is -2147483648
```

In this example, the `<limits.h>`

library is used to access constants like `INT_MAX`

and `INT_MIN`

, which represent the maximum and minimum values that an ‘int’ variable can hold, respectively.

**Common Use Cases for ‘int’**

**Counting and Indexing**: ‘int’ variables are commonly used for counting and indexing elements in arrays and loops.**Mathematical Operations**: ‘int’ is suitable for performing arithmetic operations, making it essential for mathematical calculations.