Data Types in C++

Hello azumavenger welcome to my blog. Today we are going to talk about the data types.

Data Types in C++

Actually the data type tells the compiler or the interpreter that in which mean the programmer intends to use the data. That sounds confusing right? Well their is nothing to be confused of, most of the people use the word data type and they know what it is but they can't explain it in simple words.

 Lets have an example.

A student Kutbud'deen wrote the following code

#include<iostream>

using namespace std;

void main()

{

 int var1 = 0;//integer 

 char var2 = '0';//character

 if (var1 == 0){ cout << "var1"; }

 else if (var2 == 0){ cout << "var2"; }

 else { cout << "no one"; }

 system("pause");

}

The output of this code is going to be var1. Why is it so? The answer is integers can directly be compared and used as digits, if we store digit 3 as an integer it will behave as a typical number but if we save a character '3' here it isn't going to act like digit 3, as it is a character with an ASCII 51. On comparison the compiler will compare the ASCII of the character with 0 which aren't equal and apparently the condition is false. The thing I want you to understand is that data type is the soul of the data we use.

C++ provides built-in as well as user defined data types.

List of Built-in data types

Types	Examples
Integral Types	byte, short, ushort, int, long and char
Floating Point Types	Floating and Double
Valueless Types	Void
Boolean Types	True or False value, as assigned
Wide  character	w_chart

Some websites may define void as a data type but to me void is just a keyword and a return type that defines nothing is going to be returned by the function and is not a data type. Void is never used to declare any variable as it means nothing.

User defined data types will be explained in upcoming post but just to scratch surface user defined data types are usually structures or classes. Don't  worry everything will be discussed in detail further on so just stay tuned to this blog.

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