Like all other programming languages, c sharp conditional statements are used to control the flow of the application. True condition can take you to one direction while false to other. Conditional statements can be
if(condition) {
// statements
}
Before the block of the code in the {} executed, the condition must evaluate to boolean value true. If condition goes wrong the code inside the parenthesis is ignored.
Another very good example can be
if (condition) {
// statements
} else {
// statements
}
In this example if condition become true the code in the first block get executed, otherwise pointer goes to the else part and execute the code of it.
You can make this more general as
if (condition1) {
// code to be executed
} else if(condition2) {
// code executed if condtion2 become true.
} else {
// code of else part.
}
In the above example, first condition1 is checked, if false condition2 is checked. If that is false too the code in the else statement is executed.
The if-else statements can be nested as
if(condition) {
if(inner_condtion) {
// code
} else {
// code
}
}
just play with these if else and see how the code is executed.
In addition to the if-else statements, switch statement can also play a very important role in the flow of our application. The general syntax of the switch statement is
switch(expression)
{
case 1:
// code to be executed.
break;
case 2:
// code to be executed.
break;
default:
// default code is executed.
break;
}
In switch statement every case is checked, if any of the case is true, then the code that follows the case statement is executed. If none of the case statement becomes true, then the code following the default keyword is executed.
