JNTU B.Tech I PROGRAMMING FOR PROBLEM SOLVING Previous Question Paper (March/April - 2023 - R18)

A flowchart is a graphical or diagrammatic representation of an algorithm or a step-by-step process used to solve a specific problem. It illustrates the sequence of operations, decisions, and data flow within a program using standardized geometric symbols connected by directional arrows.

Key characteristics include:

• Standardized Symbols: Utilizes specific shapes such as ovals for start/end points, parallelograms for input/output, rectangles for processing steps, and diamonds for decision-making.
• Visual Clarity: Provides a clear, high-level overview of the logic flow, making it easier to identify potential errors or bottlenecks before writing the actual source code.
• Communication Tool: Serves as an effective medium for documenting program logic, allowing developers to communicate complex algorithms to others in a language-independent manner.

In C programming, declaring a variable involves specifying its data type followed by its identifier (name) and terminating the statement with a semicolon. This process informs the compiler about the amount of memory to allocate and the type of data the variable will store.

The general syntax is:

data_type variable_name;

Key points regarding variable declaration:

• Data Type: Defines the nature of the data (e.g., int for integers, float for floating-point numbers, char for characters).
• Identifier: The name assigned to the memory location. It must follow C naming conventions (must start with a letter or underscore, cannot be a keyword).
• Multiple Declaration: Variables of the same type can be declared in a single line by separating them with commas, such as int x, y, z;.
• Initialization: A variable can be assigned an initial value during declaration, known as initialization, for example: int age = 20;.