Implicit and Explicit Type Conversion in C++

When an int is added to a double, the int is converted to a double to avoid losing the decimal portion of the result in an implicit type conversion.

The topic of the lecture is type conversion in C++.

The two categories of type conversion in C++ are implicit type conversion and explicit type conversion.

Implicit type conversion is the type conversion done automatically by the compiler.

Implicit type conversion is known as automatic type conversion because it is performed automatically by the compiler without user intervention.

Implicit type conversion usually occurs when different data types are mixed in an expression.

C++ decides lower and higher data types based on the size or range and precision of the data types.

The purpose of converting lower data types to higher data types is to avoid data loss during type conversion.

Explicit type conversion is the type conversion which is done manually by the programmer.

Explicit type conversion is used when the programmer wants full control over data type conversion.

The methods available for explicit type conversion are named casts, cast notation, and function notation.

Cast notation is the notation followed in C programming language for type conversion; it is also called C style type conversion.

Function notation uses a function-like notation for type conversion and it is also called old C++ style type conversion.

Cast notation and function notation are discouraged in modern C++ because they lack safety and readability.

Type promotion refers to the conversion of a lower data type to a higher data type, promoting the type to avoid data loss.

The type promotion hierarchy is a hierarchy of data types that shows which data types are considered higher or lower, used to guide implicit type conversions.

It is called type promotion because it shows how lower data types can be promoted to higher data types.

No, double cannot be implicitly converted to int because it would result in data loss.

In modern C++, named casts are recommended for explicit type conversion, which will be discussed further in the course.

During an implicit type conversion, the compiler converts one of the values to a type that can be consistently combined with the other value in the expression.

When an int is added to a double, the int is converted to a double to avoid losing the decimal portion of the result in an implicit type conversion.

The topic of the lecture is type conversion in C++.