[C# Tutorial 2] C Sharp Datatypes and Variables

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After having a look at introduction to C#, let’s wear the programmer’s gloves and code something. For coding any program, the integral part of the code is its variables and data type of that particular variable,

C# supports following basic data types:

  • Integer
  • Floating point
  • String
  • Boolean

Integer variable can be defined using various subset data types available as per requirement size.

Keywords

Range

Memory allocated

Sbyte

-128 to 127

1 byte

byte

0 to 255

1 byte

char

1 character(Unicode format)

2 byte

short

-32,768 to 32,767

2 byte

ushort

0 to 65,535

2 byte

int

-2,147,483,648 to 2,147,483,647

4 byte

uint

0 to 4,294,967,295

4byte

long

-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

8 byte

ulong

0 to 18,446,744,073,709,551,615

 

8 byte

Example: int age = 21;

Floating point variables can be defined using following keywords :

Keywords

Range

Memory allocated

Precision

Float

±1.5 × 10−45 to ±3.4 × 1038

4 byte

7 digits

Double

±5.0 × 10−324 to ±1.7 × 10308

8 byte

15 digits

decimal

1 character(Unicode format)

16 byte

29 digits

 Example: float percentage = 98.99;

 String keyword is used to declare a variable which contains a set of characters enclosed in double-quotes(” “). It may contain a combination of integers with alphabet.

Example : string s = “ABC”;

 

Boolean data type is used to store the either of the two values i.e True or False. It is majorly used in loops and decision making statements.

Example: bool flag = true;

The following example displays the name, total marks  and  percentage secured.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
String name = “Sachin“;                         //String variable
int sub1 = 65;                                            //int variable
int sub2 = 75;
int total = sub1 + sub2;
float per = (total / 200) * 100;                     //float variable
Console.WriteLine(name+”  scored total “+ total + “marks out of 200 “);
Console.WriteLine(“Percentage secured : ” + per);
if (per > 60)
{
Console.WriteLine(“1st Class“);
}
else
Console.WriteLine(“2nd Class“);
Console.Read();
}
}
}

Output:

By now u must have gain enough knowledge on data types and variables, still any doubt please feel free to comment. and if no doubts then lets move on to next tutorial of Operators in C sharp
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