Conversion is the process of changing the value of one Type to another.
System.Convert class
provides a complete set of methods for supported conversions.
Implicit Conversions
Explicit Conversions .
Conversions declared as implicit occur automatically, when
required and Conversions declared as explicit require a cast to be called.
1:int ctr = 999;
2:long count = ctr;
// implicit conversion
from int type to long type
|
From the above statements , first line declare an integer type
variable ctr and assigned 999 to it.
Second line declare a long type variable count and assign the
value of ctr to count. Here the conversion occurred automatically.
Because we converted an integer type to long type . This type of
conversion is called Implicit Conversion .
1:int ctr = 999;
2:long count = ctr;
// implicit conversion
from int type to long type
3:int cnt = (int)count;
// explicit conversion
from long type to int type
|
We already saw the Implicit
Conversion happened in the second line . The third line again we
converted long Type to an integer type .
Here we explicitly convert long type to integer (int cnt =
(int)count), otherwise the compiler will show
compiler
error - Error 1 Cannot
implicitly convert type 'long' to 'int'. An explicit conversion exists (are you
missing a cast?) .
This type of conversion is called Explicit Conversion .