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The onfocusin event triggers when an element is to get focus. You can try to run the following code to learn how to implement onfocusin event in JavaScript −Example Write below: function newFunc(x) { x.style.background = "blue"; }
When a value is added in an input box, then the oninput event occurs. You can try to run the following code to learn how to implement oninput event in JavaScript −Example Write below: function inputFunc() { var a = document.getElementById("newInput").value; document.write("Typed: " + a); }
Int32 represents a 32-bit signed integer. To represent it as a string, use the ToString() method.Firstly, declare and initialize an Int32 variable.int val = 1023;Now, represent it as a string.val.ToString()Let us see the complete example.Example Live Demousing System; class Demo { static void Main() { int val = 1023; Console.Write("Integer converted to string = "+val.ToString()); } }OutputInteger converted to string = 1023
The WindowWidth property gets or sets the width of the console window.Declare a variable.int width;Now, get the width of the current window.width = Console.WindowWidth;The following is the complete example.Example Live Demousing System; using System.Numerics; using System.Globalization; class Demo { static void Main() { int width; int height; width = Console.WindowWidth; height = Console.WindowHeight; Console.WriteLine("Current window width = "+width); Console.WriteLine("Current window height = "+height); } }OutputCurrent window width = 0 Current window height = 0
The ChangeType() method returns an object of the specified type and whose value is equivalent to the specified object.Let’s say we have a double type.double val = -3.456Now, use the ChangeType method to change the type to integer.num = (int)Convert.ChangeType(val, TypeCode.Int32);Let us see the complete example.Example Live Demousing System; public class Demo { public static void Main() { double val = -3.456; int num = (int)Convert.ChangeType(val, TypeCode.Int32); Console.WriteLine("{0} converted to an Int32: {1}", val, num); } }Output-3.456 converted to an Int32: -3
The Convert.ToByte method is used to convert a specified value to an 8-bit unsigned integer.Let’s say we have a char variable.Char charVal = ‘a’;Now, convert it to an 8-bit unsigned integer.byte byteVal = Convert.ToByte(charVal);Let us see another example now.Example Live Demousing System; public class Demo { public static void Main() { char[] charVal = { 'p', 'q', 'r', 's' }; foreach (char c in charVal) { byte byteVal = Convert.ToByte(c); Console.WriteLine("{0} is converted to = {1}", c, byteVal); } } }Outputp is converted to = 112 q is converted to = 113 r is converted to = 114 s is converted to = 115
The Convert.ToBoolean method is used to convert a specified value to an equivalent Boolean value.The following is our double type.double doubleNum = 329.34;To convert it to Boolean, use the Convert.ToBoolean() method.bool boolNum; boolNum = System.Convert.ToBoolean(doubleNum);Let us see another example.Example Live Demousing System; public class Demo { public static void Main() { double doubleNum = 3.4; bool boolNum; // Double to bool boolNum = System.Convert.ToBoolean(doubleNum); System.Console.WriteLine("{0} as a Boolean = {1}.", doubleNum, boolNum); } }Output3.4 as a Boolean = True.
Get the last element from a sequence using the Linq Last() method.The following is our array.int[] val = { 10, 20, 30, 40 };Now, get the last element.val.AsQueryable().Last();Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Demo { static void Main() { int[] val = { 10, 20, 30, 40 }; // getting last element int last_num = val.AsQueryable().Last(); Console.WriteLine("Last element: "+last_num); } }OutputLast element: 40
Use the Convert.ToUInt64() method to convert a specified value to a 64-bit unsigned integer.The following is our char.char ch = 'a';Now, let’s convert it to a 64-bit unsigned integer.ulong res; res = Convert.ToUInt64(ch);Here is the complete example.Example Live Demousing System; public class Demo { public static void Main() { char ch = 'a'; ulong res; res = Convert.ToUInt64(ch); Console.WriteLine("Converted char value '{0}' to {1}", ch, res); } }OutputConverted char value 'a' to 97
The “0” custom specifier is a zero placeholder.If the value to be formatted has a digit in the position where the zero appears in the format string, the the digit is copied to the resultant string. However, if this doesn’t happen, then a zero appears.Here is our double variable.double d; d = 292;Now, by setting the following, you can easily make zero appear in the format string.d.ToString("00000")Example Live Demousing System; using System.Globalization; class Demo { static void Main() { double d; d = 292; Console.WriteLine(d.ToString("00000")); Console.WriteLine(String.Format("{0:00000}", d)); ... Read More