swerIf an expression contains double, int, float, long, then the whole expression will be promoted into which of these data types?Optionslongdoubleintfloat

To determine which data type the whole expression will be promoted to when it contains multiple data types such as double, int, float, and long, we need to consider the rules of implicit type conversion (also known as type promotion) in programming languages like C and C++.

1. Break Down the Problem

• Identify the data types involved: double, int, float, long.
• Review the rules of type promotion regarding these specific types.

2. Relevant Concepts

• In C/C++, when different types are used in an expression, the types are promoted to the highest type according to a specific hierarchy:
  • The hierarchy of data types in terms of promotion is:
    • double > float > long > int

3. Analysis and Detail

• Since double has the highest precedence in the context of type promotion, any expression that includes double will promote all other types to double.
• Thus, if an expression contains double, int, float, and long, the entire expression is promoted to double.

4. Verify and Summarize

• Following the established type promotion rules, we confirm that regardless of the other types in the expression (int, float, long), the presence of double dictates that the entire expression is evaluated as double.

Final Answer

The whole expression will be promoted to double.