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C# / CSharp Tutorial » Data Type » Data Type Cast

2. 49. 17. Using checked and unchecked.


 

 

using System; 

 

class MainClass {  

  public static void Main() {  

    byte a, b; 

    byte result; 

 

    a = 127; 

    b = 127; 

  

    try {  

      result = unchecked((byte)(a * b)); 

      Console.WriteLine("Unchecked result: " + result); 

 

      result = checked((byte)(a * b)); // this causes exception 

      Console.WriteLine("Checked result: " + result); // won't execute 

    }  

    catch (OverflowException exc) {  

      // catch the exception  

      Console.WriteLine(exc); 

    }  

  }  

}

Unchecked result: 1
System.OverflowException: Arithmetic operation resulted in an overflow.
   at MainClass.Main()

2. 49. Data Type Cast
	2. 49. 1.	Type Conversion in Expressions
	2. 49. 2.	Automatic Conversions
	2. 49. 3.	The use of the cast operator: how information loss can occur when explicitly converting a variable of one type to another
	2. 49. 4.	Automatic conversion from long to double
	2. 49. 5.	Cast an int into a double
	2. 49. 6.	Cast an int into a byte, no data lost
	2. 49. 7.	Cast an int into a byte, data lost
	2. 49. 8.	Cast a uint into a short, no data lost
	2. 49. 9.	Cast a uint into a short, data lost
	2. 49. 10.	Cast a long into a uint, no data lost
	2. 49. 11.	cast a long into a uint, data lost
	2. 49. 12.	Cast an int into a char
	2. 49. 13.	Cast byte back for byte calculation
	2. 49. 14.	Using casts in an expression.
	2. 49. 15.	Conversions of numeric types: checked and unchecked conversions
	2. 49. 16.	Conversions of numeric types: checked conversions block
	2. 49. 17.	Using checked and unchecked.
	2. 49. 18.	Using checked and unchecked with statement blocks.
	2. 49. 19.	Most significant bits lost
	2. 49. 20.	Raises the OverflowException exception
	2. 49. 21.	Get Type Code after casting

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