Real-Life Example

Often in our examples, we simplify variable names to match their data type (myInt or myNum for int types, myChar for char types, and so on). This is done to avoid confusion..

However, if you want a real-life example on how variables can be used, take a look at the following, where we have made a program that stores different data of a college student:

Example

#include

int main() {

// Student data

int studentID = 15;

int studentAge = 23;

float studentFee = 75.25;

char studentGrade = 'B';

// Print variables

printf("Student id: %d\n", studentID);

printf("Student age: %d\n", studentAge);

printf("Student fee: %f\n", studentFee);

printf("Student grade: %c", studentGrade);

return 0;

}

Output

Student id: 15

Student age: 23

Student fee: 75.250000

Student grade: B

Calculate the Area of a Rectangle:

Calculate Real-World Areas with a Rectangle Program (Length x Width):

Example

#include

int main() {

// Create integer variables

int length = 4;

int width = 6;

int area;

// Calculate the area of a rectangle

// OK, but not so easy to understand what m actually is

area = length * width;

// Print the variables

printf("Length is: %d\n", length);

printf("Width is: %d\n", width);

printf("Area of the rectangle is: %d", area);

return 0;

}

Output

Length is: 4

Width is: 6

Area of the rectangle is: 24