Variables in C

My C/C++ Videos on Youtube

Here is the complete playlist for video lectures and tutorials for the absolute beginners. The language has been kept simple so that anybody can easily understand them. I have avoided complex jargon in these videos.

Types of Data

1. Integer numbers like 78, 632
2. Floating point numbers like 23.7, 975.003
3. Single characters of text like - 'a', 'Y', '$', etc.,
4. Strings of characters like words - "hoven", "India", etc.,

Data Types

Similarly, each data can be stored only in the type meant for it. Integer numbers can be stored in an "int" datatype. Floating point numbers can be stored in "float" datatype. Single character types can be stored in "char" type, and strings of text can be stored in "string" type. The code below creates an int type of variable to store an integer number called 99. Here "i" is the name of the container, and it's type is int.

int main()
{
    int i = 99;

    return 0;

}

int main()
{
    int i = 99;
 
    float h = 9.8;
 
    char c = 'A';
 
    return 0;
 
}

Identifiers

1. Identifier names are written only with these characters: a-z, A-Z, 0-9 or an underscore.
2. The name cannot start with a number.

I/O of integers in C

#include<iostream>
#include<cstdio>
 
int main()
{
    int c = 5;
    
    printf("Number = %d",c);
    
    return 0;
}

I/O of floats in C

#include<iostream>
#include<cstdio>

using namespace std;
 
int main()
{
 
     float a;
 
     printf("Enter value: ");
 
     cin >> a;
     
     printf("Value = %f ",a); //%f is used for floats
 
     return 0;
 
}

I/O of characters

#include<iostream>
#include<cstdio>

using namespace std;
 
int main()
{
     char var1;
 
     printf("Enter character: ");
 
     cin >> var1; 
 
     printf("You entered %c.",var1); 
 
     return 0;
}

I/O of characters and ASCII code

#include<iostream>
#include<cstdio>

using namespace std;
 
int main()
{
     char var1;
 
     printf("Enter character: ");
 
     cin >> var1; 
     
     printf("You entered %c.",var1); 
 
     cout << "ASCII = " << (int)var1 << endl;
 
     return 0;
}

Swapping two numbers

#include<iostream>
#include<cstdio>

using namespace std;
 
int main()
{ 
     int a;
     
     int b;
     
     printf("Enter first no. ");
     
     cin >> a;
 
     printf("Enter second no.");
 
     cin >> b;
     
     int c = a;
     
     a = b;
     
     b = c;
     
     printf("%d \n %d", a, b);
 
     return 0; 
        
}

Swaping - Method 2

#include<iostream>
#include<cstdio>
 
using namespace std; 
 
int main() 
{ 
 
    int a, b;
    
    cout << "Enter the first no. = ";
    
    cin >> a;
    
    cout << "Enter the second no. = ";
    
    cin >> b; 
    
    a = a + b;
    
    b = a - b;
    
    a = a - b;
    
    printf("After interchange \n");
    
    printf("First is no. = %d \nSecond is no. = %d", a , b);
    
    return 0 ;
 
}

Square

#include<iostream>
#include<cstdio>
 
using namespace std; 
 
int main() 
{ 
 
    int a;
    
    cout << "Enter no. = ";
    
    cin >> a;
    
    int num = a * a;
    
    cout << "Square is = " << num << endl; 
    
    return 0 ;
 
}

Square and cube

#include<iostream>
#include<cstdio>
 
using namespace std; 
 
int main() 
{ 
 
    int a;
    
    cout << "Enter no. = ";
    
    cin >> a;
    
    int square = a * a;
    
    int cube = a * a * a ;
    
    cout << "Square is = " << square << endl; 
    
    cout << "Cube is = " << cube << endl; 
    
    return 0 ;
 
}

Classroom Training

Classroom training in C/C++ is available at our training institute. Click here for details. You can also register yourself here.

Video Tutorial

We have created a video tutorial that can be downloaded and watched offline on your windows based computer. It is in the form of an exe file. No installation is required, it runs by double clicking the file. Since the exe file is hosted on the Google Drive, it should be very safe because Google itself checks for any virus or malware. The video can be watched offline, no internet is required.

Pricing

This single video will cost you USD $5. When you download the video, you will be able to watch the first few minutes for free, as a sample. The video app will prompt you for payment through PayPal and other payment options. If you want ALL VIDEOS, NOT JUST THIS ONE then go here: Complete Set of C/C++ Video Tutorials The entire set is priced at USD $50.

Screenshots

Installation

Supported Operating Systems

These videos can be run on 32-bit as well as 64-bit versions of the Microsoft Windows Operating Systems. Windows XP and all later OS are supported. If you want to run it on Windows XP and Windows Vista, then you must also have the .NET Framework Version 3.5 installed on your machines. Those users who have Windows 7 and later donot have to worry because these operating systems already have the .NET Framework installed on them.

Download Links

IMPORTANT NOTE: This download contains ONLY ONE video. The video is about the topic of this tutorial.

Want ALL Videos? If you want ALL VIDEOS, NOT JUST THIS ONE then go here: Complete Set of C/C++ Video Tutorials. TIP: If you plan to buy these videos, then it would be more economical to buy the entire set.

DISCLAIMER: Even though every care has been taken in making this software bug-free, but still please take a proper backup of your PC data before you use it. We shall not be responsible for any damages or consequential damages arising out of the use of this software. Please use it solely at your own risk.

Please download the software here.