Syntax of if condition :
Syntax 1
If (condition)
Statement 1 ;
Else Statement 2;
Syntax 2
If (condition)
{
Statement 1 ;
Statement 2;
}
Else
{
Statement 3;
Statement 4;
}
If (condition)
Statement 1 ;
Else If (condition)
Statement 1 ;
Else If (condition)
Statement 1 ;
Else
.
Else Statement;
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A program to compare two numbers (I and j), if I is greater change from back color to green otherwise REO.
Open windows form application project
Place two text boxes and a button
Click on button 1
Code for button 1
Int I = int. parse (text Box 1. text);
Int j =int. parse (text Box2.text);
If (i> j)
This. Back color = color. Green;
Else
This. Back color = color. Red;
Execute the project
Observations
What is this key?
this is a keyword
this works like an object for the current class
this will be created at run time.
this is under the control of CLR.
Switch (variable)
{
Case 1: Statements;
Break;
Case 2: Statements;
Break;
. Default Statements;
Break;
}
Example of a Switch condition
Open windows form application project Place a text box and a button Code for button 1 click
{
Int I = int. parse (text box 1. text);
Switch (i) { …. }
//switched close here
Switch (i)
{
Case 1: This. back color = color. Green ;
Break;
Case 2 : Color dialog c = new dialog ();
Creating an object
show dialog ();
this. Back color = c. color;
break;
case 3: Application . Exit ();
Break;
Default : Message box . show (“enter 1,2, or 3 only”);
Break;
}
// switch closed here Execute the project
Observations
Syntax to create an object Class name (space) obj _name = new class name ();
EX:-
Color dialog is a predefined class
Application is a class which contains Exit () method
Purpose of exit () is to terminate the project
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