Implicit Conversion & Explicit Conversion

Hello Expert,

What is basic difference in Implicit conversion & Explicit Conversion?

Thanks.....................

Hello,

this kind of question isn't easy answer without good description/example in my opinion. I recommend use web for this thema, simply google this, you can read also some C++ or other languages description about this, this doesn't matter generally.

Ashok Naphade

What is basic difference in Implicit conversion & Explicit Conversion?

 If you have in mind data types conversion basically it goes like this:

- implicit conversion is done automatically by the compiler according to rules defined by the standard of the programming language;

ex. 1

DINTvar := INTvar + DINTvar; INT variable will be implicitly converted to DINT and then added to another DINT then result will be written

ex. 2

INT := INT + DINT; DINT variable can't be converted implicitly to INT, and this is needed to add both numbers on right side or to adjust result to INT; the compiler will throw an error

- explicit conversion is made by a programmer with help of functions/operators as it is presumed by the compiler that the programmer made all checks needed to execute this operation successfully

ex.

INTvar:=DINT_TO_INT(DINTvar); DINT variable value must be checked against range of INT to prevent overflow, which can not signaled