C is a general-purpose, procedural programming language developed by Dennis Ritchie. It is widely used for system programming, embedded systems, operating systems, and application development because of its speed, efficiency, and close interaction with computer hardware.

A compiler translates the entire source code into machine code before execution, making programs run faster. An interpreter translates and executes code line by line, making debugging easier but execution slower. C uses a compiler.

A variable is a named memory location used to store data. Data types define the type of data a variable can hold. Common data types include int, float, char, double, and void.

• for loop: Used when the number of iterations is known.
• while loop: Used when the condition is checked before execution.
• do...while loop: Executes at least once because the condition is checked after execution.

• = is the assignment operator used to assign values.
• == is the comparison operator used to compare two values.

An array is a collection of elements of the same data type stored in contiguous memory locations. Arrays are used to store multiple values under a single variable name.

A function is a reusable block of code that performs a specific task. Functions improve code readability, modularity, and reduce code duplication.

A pointer is a variable that stores the memory address of another variable. Pointers are widely used for dynamic memory allocation, arrays, functions, and efficient memory management.