Mega Code Archive
0012 Variable
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A variable stores value and variable type defines the behaviours of the variable.
The following code uses the int type variable to calculate the result of 2 plus 2.
using System;
class Program
{
static void Main(string[] args)
{
int i = 2;
int j = 2;
int result = i + j;
Console.WriteLine("result=" + result);
}
}
The result:
result=4
In the code above, i and j are two variables. The + (adding) is the behaviour.
int is a predefined data type in C#.
Another predefined data type is string. You can store a list of characters in the string type variable.
using System;
class Program
{
static void Main(string[] args)
{
string str = "demo from rntsoft.com";
Console.WriteLine("str=" + str);
}
}
The result:
str=demo from rntsoft.com
The string type variable can be converted to its upper case form:
using System;
class Program
{
static void Main(string[] args)
{
string str = "demo from rntsoft.com";
Console.WriteLine("str=" + str.ToUpper());
}
}
The output:
str=DEMO FROM RNTSOFT.COM
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