Optional parameters has a default value.
//the second parameter is optional, it's default is a empty string
public void f(int i,string s="")
{
...
}
//How to use
f(3);
f(3,"good");
| |||
 | C# Data Types | ||||||||||||||||||||||||||||||||||||
| • ArrayList | • bool | ||
| • Array | • byte | ||
| • DateTime | • DataTable | ||
| • delegate | • Dictionary | ||
| • enum | • HashSet | ||
| • int | • List | ||
| • long | • multiarray | ||
| • null | • Nullable | ||
| • string | • Struct | ||
| • Tuple |
| C# Loop & Conditions | ||||||||||||||||||||
| • break | • continue | ||
| • Exception | • for | ||
| • foreach | • goto | ||
| • if else | • or | ||
| • switch | • try catch | ||
| • while |
| C# String Functions | ||||||||||||||||
| • IndexOf | • Join | ||
| • newline | • query string | ||
| • Regex | • Replace | ||
| • Split | • Upper Lower | ||
| • Uri |
| C# OOP | ||||||||||||||||||||||||||
| • attributes | • base | ||
| • class | • constructor | ||
| • event | • get set | ||
| • inheritance | • messagebox | ||
| • new | • object | ||
| • override | • property | ||
| • protected | • readonly |