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Articles by Chandu yadav
Page 12 of 81
Integer literals vs Floating point literals in C#
Integer LiteralsAn integer literal can be a decimal, or hexadecimal constant. A prefix specifies the base or radix: 0x or 0X for hexadecimal, and there is no prefix id for decimal. Here are some of the examples of integer literals −10 // int 18u // unsigned intLet’s use the above literal while declaring and initializing a variable −// int int a =10;We will now print the values −Exampleusing System; namespace Demo { class Program { static void Main(string[] args) { // int int a =200; ...
Read MoreDefault value of bool in C#
Use the default operator to get the default value of bool type −bool a = default(bool);Above, we have used the default keyword to get the default value.Let us see the code to display default value of bool −Exampleusing System; public class Demo { public static void Main() { bool a = default(bool); // default for bool Console.WriteLine("Default for bool type = "+a); } }OutputThe following is the output. It shows a blank space i.e. False.Default for bool type = False
Read MoreC# NullReferenceException
NullReferenceException occurs when you try to to access member fields, or function types that points to null.Here is an example −Exampleusing System; class Demo { static void Main() { string str = null; if (str.Length > 0) { Console.WriteLine(str); } } }OutputThe following is the output. It throws NullReferenceException, since you are tryonhg access a memebt that points to null −Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object at Demo.Main () [0x00002] in :0 [ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object at Demo.Main () [0x00002] in :0
Read MoreWhat are key-based I/O collections in C#?
The key-based I/O Collections in C# is what we call a SortedList −SortedListThe SortedList class represents a collection of key-and-value pairs that are sorted by the keys and are accessible by key and by index. This is how both of them gets added in a SortedList −s.Add("Sub1", "Physics"); s.Add("Sub2", "Chemistry"); s.Add("Sub3", "Biology"); s.Add("Sub4", "Java");The following is an example displaying the keys and values in a SortedList −Exampleusing System; using System.Collections; namespace Demo { class Program { static void Main(string[] args) { SortedList s = new SortedList(); ...
Read MoreUsage of Bootstrap next class to right-align the links
Use the .next class in Bootstrap to right align the links. You can try to run the following code to implement the .next class:Example Bootstrap Example Answers ← Older Newer →
Read MoreWays to print escape characters in C#
The following are the escape characters in C# and the display column suggests how to use and print them in C# −Escape CharacterDescriptionPatternDisplay\aMatches a bell character, \u0007.\a"\u0007" in "Warning!" + '\u0007'\bIn a character class, matches a backspace, \u0008.[\b]{3, }"\b\b\b\b" in "\b\b\b\b"\tMatches a tab, \u0009.(\w+)\t"Name\t", "Addr\t" in "Name\tAddr\t"\rMatches a carriage return, \u000D. (\r is not equivalent to the newline character, .)\r(\w+)"\rHello" in "\r\HelloWorld."\vMatches a vertical tab, \u000B.[\v]{2, }"\v\v\v" in "\v\v\v"\fMatches a form feed, \u000C.[\f]{2, }"\f\f\f" in "\f\f\f"Matches a new line, \u000A.\r(\w+)"\rHello" in "\r\HelloWorld."\eMatches an escape, \u001B.\e"\x001B" in "\x001B"nnUses octal representation to specify a character (nnn consists of up to three digits).\w\040\w"a ...
Read MoreTimeSpan.From methods in C# ()
The TimeSpan.From methods include FromDays, FromHours, FromMinutes, etc.To get the TimeSpan for all the methods// Days TimeSpan t1 = TimeSpan.FromDays(1); // Hours TimeSpan t2 = TimeSpan.FromHours(1); // Minutes TimeSpan t3 = TimeSpan.FromMinutes(1);The following is the code that works on all the TimeSpan methods −Exampleusing System; using System.Linq; public class Demo { public static void Main() { TimeSpan t1 = TimeSpan.FromDays(1); TimeSpan t2 = TimeSpan.FromHours(1); TimeSpan t3 = TimeSpan.FromMinutes(1); Console.WriteLine(t1); Console.WriteLine(t2); Console.WriteLine(t3); } }Output1.00:00:00 01:00:00 00:01:00
Read MoreFormat TimeSpan in C#
You can format a TimeSpan in the hh: mm: ss format in C#.Firstly, set the TimeSpan −TimeSpan ts = new TimeSpan(9, 15, 30);To format TimeSpan −{0:hh\:mm\:ss}The following is the code −Exampleusing System; using System.Linq; public class Demo { public static void Main() { TimeSpan ts = new TimeSpan(9, 15, 30); Console.WriteLine("{0:hh\:mm\:ss}", ts); } }Output09:15:30
Read MoreBootstrap page-header class
Page header is used to add appropriate spacing around the headings on a page.To use a page header, wrap your heading in a with a class of .page-header −Example Bootstrap Example Header Subtext for header Demo text! Demo text! Demo text! Demo text! Demo text! Demo text! Demo text! Demo text! Demo text!
Read MoreDisplay years in different formats with C# DateTime
Set a DateTime object;DateTime dt = DateTime.Now;To get years in different formats, try the following −dt.ToString("yy") dt.ToString("yyy") dt.ToString("yyyy") dt.ToString("yyyyy")Here is the complete code −Exampleusing System; using System.Threading; using System.Diagnostics; public class Demo { public static void Main() { DateTime dt = DateTime.Now; // Today's date Console.WriteLine("Today = {0}", DateTime.Today); Console.WriteLine("Displaying current year in dufferent formats:"); Console.WriteLine(dt.ToString("yy")); Console.WriteLine(dt.ToString("yyy")); Console.WriteLine(dt.ToString("yyyy")); Console.WriteLine(dt.ToString("yyyyy")); } }OutputToday = 9/4/2018 12:00:00 AM Displaying current year in dufferent formats: 18 2018 2018 02018
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