Type Casting

In C++, type casting refers to converting one data type to another. This can be necessary when performing operations involving different data types or when data needs to fit into a specific type.

Mathematical operations and data types

When performing mathematical operations, the result’s data type is determined by the types of the operands. The rule is simple: the result’s data type is the larger of the two operands’ types. For example:

• Adding a float and a double: The result will be a double since double is larger than float.

• Adding a float and an int: The result will be a float since a float is larger than an int.

• Adding two integers: The result will be an integer.

• Multiplying an int and a double: The result will be a double, as it is larger than an int data type.

The compiler automatically handles these conversions, ensuring that the result is stored in the appropriate type.

Data types

Let’s look at the illustration below.