C# | Double.ToString() Method | Set – 1
Double.ToString() Method is used to convert the numeric value of the current instance to its equivalent string representation. There are 4 methods in the overload list of this method as follows:
- ToString(String) Method
- ToString() Method
- ToString(IFormatProvider) Method
- ToString(String, IFormatProvider) Method
Here, we will discuss the first two methods.
ToString(String) Method
This method is used to convert the numeric value of the current instance to its equivalent string representation, using the specified format.
Syntax: public string ToString (string format);
Here, it takes a numeric format string.Return Value: This method returns the string representation of the value of the current instance as specified by format.
Exceptions: This method throws FormatException if format is invalid.
Example 1:
// C# program to demonstrate the // Double.ToString(String) Method using System; class GFG { // Main Method public static void Main() { try { // Declaring and initializing value double value = 16325.62d; // Declaring and initializing format string s = "E04" ; // using the method string str = value.ToString(s); // Display the value Console.WriteLine( "String value is {0}" , str); } catch (FormatException e) { Console.WriteLine( "Format is invalid." ); Console.Write( "Exception Thrown: " ); Console.Write( "{0}" , e.GetType(), e.Message); } } } |
String value is 1.6326E+004
Example 2: For FormatException
// C# program to demonstrate the // Double.ToString(String) Method using System; class GFG { // Main Method public static void Main() { try { // Declaring and initializing value double value = 16325.62d; // Declaring and initializing format string s = "a" ; // using the method string str = value.ToString(s); // Display the value Console.WriteLine( "String value is {0}" , str); } catch (FormatException e) { Console.WriteLine( "Format is invalid." ); Console.Write( "Exception Thrown: " ); Console.Write( "{0}" , e.GetType(), e.Message); } } } |
Format is invalid. Exception Thrown: System.FormatException
ToString() Method
This method is used to convert the numeric value of the current instance to its equivalent string representation.
Syntax: public override string ToString ();
Return Value: This method returns a string which represents the value of this instance.
Below programs illustrate the use of Double.ToString() Method:
Example 1:
// C# program to demonstrate the // Double.ToString() Method using System; class GFG { // Main Method public static void Main() { // Declaring and initializing value double value = 7922816251426433759354.39503305d; // using ToString() method string round = value.ToString(); // Display the value Console.WriteLine( "String value is {0}" , round); } } |
String value is 7.92281625142643E+21
Example 2:
// C# program to demonstrate the // Double.ToString() Method using System; using System.Globalization; class GFG { // Main Method public static void Main() { // calling get() method get (20.3495d); get (30.5945994d); get (40d); get (4294967295.5858d); } // defining get() method public static void get ( double value) { // using ToString() method string round = value.ToString(); // Display the value Console.WriteLine( "String value is {0}" , round); } } |
String value is 20.3495 String value is 30.5945994 String value is 40 String value is 4294967295.5858
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.double.tostring?view=netframework-4.7.2
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