Which concept emphasizes using descriptive names for variables to improve readability?

• A. Commenting
• B. Meaningful identifiers
• C. Compiler
• D. Nested iteration

Answer: (B)

Using descriptive names for variables improves readability and makes code easier to understand. When a variable is named something like totalPrice or itemCount instead of a short, vague name like x or temp, you can infer what data it stores without needing extra notes. This practice, often called meaningful identifiers, helps debugging and collaboration because the purpose of each variable is clear at a glance, reducing confusion and cognitive effort when reading the code.

Commenting adds explanations alongside code, which is helpful, but it doesn’t directly change how variables are named or how readable the code is on its own. The compiler is the tool that translates code into executable instructions; it doesn’t affect readability through variable naming. Nested iteration concerns the structure of loops and control flow, not how variables are named.