Type casting is a way to convert a variable from one data type to another data type.
if you want to store a long value into a simple integer then you can type cast long to int.
You can convert values from one type to another explicitly using the cast operator.
It should be noted here that the cast operator has
- precedence over division,
so the value of sum is first converted to type double and finally it gets divided by count yielding a double value.
Type conversions can be implicit which is performed by the compiler automatically or it can be specified explicitly through the use of the cast operator.
It is considered good programming practice to use the cast operator whenever type conversions are necessary.
Integer promotion is the process by which values of integer type “smaller” than int or unsigned int are converted either to int or unsigned int.
Usual Arithmetic Conversion
The usual arithmetic conversions are implicitly performed to cast their values in a common type.
Compiler first performs integer promotion, if operands still have different types then they are converted to the type that appears highest in the following hierarchy:
- Unsigned int
- Unsigned long
- Long long
- Unsigned long long
- Long double
The usual arithmetic conversions are not performed for the assignment operators, nor for the logical operators && and ||. Let us
Here, it is simple to understand that first c gets converted to integer but because final value is float, so usual arithmetic conversion applies and compiler converts i and c into float and add them yielding a float result.