Day 4: C++ language | Variables | Datatypes | Part-2

Please make sure to refer Day3: C++ language | Variables | Datatypes | Part-1

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Topics to be covered

• Variables
• Declare multiple Variables
• User Input

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Variables

#include <iostream>
using namespace std;
int main(){
int age = 15;
cout << "my age is:" << age << endl ;

}

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Declare multiple variables

To declare more than one variable of the same type.

#include <iostream>
using namespace std;
int main(){

int x = 15, y = 6, z = 50;
cout << x + y + z;

}

You can also assign the same value to multiple variables in one line.

#include <iostream>
using namespace std;

int main(){

int x, y, z;
x = y = z = 60;
cout << x + y + z;

}

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User input

In C++, the term "input" generally refers to the process of taking data from an external source (like the user or a file) and storing it in a variable for use in your program.

cin is a predefined variable that reads data from the keyboard with the extraction operator (>>) .

• cout is pronounced "see-out". Used for output,and uses the insertion operator (<<)
• cin is pronounced "see-in". Used for input, and uses the extraction operator (>>)

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int z, y;
int sum;
cout << "Type a number: ";
cin >> z;
cout << "Type another number: ";
cin >> y;
sum = x + y;
cout << "Sum is: " << sum;

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Here I gave two numbers 50 and 45 , it can be any according to that result varies.

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Previous Blog

• Day1:Introduction to C++

• Day2:C++ language | output

• Day3: C++ language | variables | datatypes |part1