C programming basic questions

  Here are some basic beginner questions related to C programming that can help you practice and understand the fundamentals:

What is C programming language?

What is the basic structure of a C program?

What is a variable in C?

How do you declare a variable in C?

What are the basic data types in C?

What is the difference between int and float data types?

How do you input data from the user in C?

How do you display output in C?

What are comments in C? How are they written?

What is the use of the printf function in C?

What is the use of the scanf function in C?

What are arithmetic operators in C?

How do you perform addition, subtraction, multiplication, and division in C?

What are relational operators in C?

What are logical operators in C?

What is the if statement in C?

What is the for loop in C?

What is the while loop in C?

What is the do-while loop in C?

How do you find the size of a variable or data type in C?

What is an array in C? How do you declare and initialize an array?

What is a function in C? How do you declare and define a function?

What is the difference between call by value and call by reference in functions?

How do you return a value from a function in C?

What is a pointer in C? How do you declare and use pointers?

 Here are the short answers to the beginner questions in C programming:

Answers:👇

What is C programming language?

C is a general-purpose programming language known for its efficiency and low-level memory access.

Basic structure of a C program:

A C program consists of functions where each program must have a main() function.

What is a variable in C?

A variable is a named storage location in C used to store data values.

How do you declare a variable in C?

Variables are declared with a data type and a name, like

 int num;

Basic data types in C:

Integers (int), floating-point numbers (float), characters (char), and booleans (_Bool).

Difference between int and float:

int stores whole numbers, while float stores decimal numbers.

Input from user in C:

Use scanf() function to take input from the user.

Display output in C:

Use printf() function to display output on the screen.

What are comments in C?

Comments are used for adding notes; they start with /* and end with */.

Use of printf function:

printf() is used for formatted output, allowing variables to be displayed.

Use of scanf function:

scanf() is used for formatted input, allowing user input to be stored in variables.

Arithmetic operators:

+ (addition), - (subtraction), * (multiplication), / (division).

Relational operators:

< (less than), > (greater than), <= (less than or equal to), >= (greater than or equal to).

Logical operators:

&& (logical AND), || (logical OR), ! (logical NOT).

if statement in C:

Conditional statement that executes code based on a condition.

for loop in C:

Loop that executes a block of code a specified number of times.

while loop in C:

Loop that executes a block of code as long as a specified condition is true.

do-while loop in C:

Loop that executes a block of code first and then checks the condition.

Finding size of a variable:

Use sizeof() operator to determine the size of a variable or data type.

What is an array in C?

An array is a collection of elements of the same data type, stored in contiguous memory locations.

What is a function in C?

A function is a reusable block of code. It can be called with arguments and can return a value.

Difference between call by value and call by reference:

Call by value passes a copy of the variable; call by reference passes the address of the variable.

Returning a value from a function:

Use the return keyword followed by the value to be returned.

What is a pointer in C?

A pointer is a variable that stores the memory address of another variable.

These brief explanations cover the basic concepts of C programming.