Understanding selection statements
Every application needs to be able to select from choices and branch along different code paths. The two selection statements in C# are
switch. You can use
if for all your code, but
switch can simplify your code in some common scenarios, such as when there is a single variable that can have multiple values that each require different processing.
Branching with the if statement
if statement determines which branch to follow by evaluating a Boolean expression. If the expression is
true, then the block executes. The
else block is optional, and it executes if the
if expression is
if statement can be nested.
if statement can be combined with other
if statements as
else if branches, as shown in the following code:
// Executes if expression1 is true.
else if (expression2)
// Executes if expression1 is false and expression2 is true.
else if (expression3)
// Executes if expression1...