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For example:
int age;
char grade;
Where, int and char are the data types, and, age and name are the variable names. You can also
declare multiple variables of the same type in a single line in the following way:
int emp_code, age, pincode;
Initializing a Variable
Initializing a variable means to assign a value to the variable. You can assign a value to a variable
using the assignment operator (‘=’) in the following way:
age = 21; // initializing an integer variable
grade = ‘A+’; // initializing a character variable using single quote
In the preceding example, you can see that the single quotes are used to initialize a character
variable. A variable can also be initialized during their declaration itself in the following way:
int age = 21;
char grade = ‘A+’;
Let us create a program to better understand the concepts.
Program 1: To swap the values of two variables using third variable.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a, b, temp;
a = 10;
b = 20;
cout<<”Values of a and b before swapping are “<<a<< “ and “ <<b<< “.\n”;
temp = a;
a = b;
b = temp;
cout<<”Values of a and b after swapping are “<<a<< “ and “ <<b<< “.”;
getch();
}
The output of the preceding program is as shown:
16 Touchpad MODULAR (Version 1.1)-X

