The numbers in between are obtained by adding the two numbers directly above them in the previous row. In this problem, you have to write a simple program to read a string str entered by the user and print the first letter of each word in a string. In this problem, you have to write a program to create an array of size n dynamically then take n elements of an array one by one by the user. The best way to learn C programming language is by hands-on practice. This C Exercise page contains the top 30 C exercise questions with solutions that are designed for both beginners and advanced programmers. It covers all major concepts like arrays, pointers, for-loop, and many more.

• The program should create various structures, each representing a student’s record.
• Something to note with while loops is that the code in the loop’s body is not guaranteed to run even at least one time if a condition is not met.
• It holds 4 bytes (or 32 bits) of memory and it is a single-precision floating-point type.
• The loop will continue as long as i is less than or equal to 5.
• The sizeof(grades[0]) calculates the size of a single element in bytes.

In order to execute the above program, we need to first compile it using a compiler and then we can run the generated executable. There are online IDEs available for free like GeeksforGeeksIDE, that can be used Programming C# 6 Lessons to start development in C without installing a compiler. Compared to the while loop, the do- while loop is guaranteed to run at least once and execute the code inside the curly braces at least one time.

Why to Learn C Programming?

Most even happen automatically, without us even realising it. But when you’re implementing part of an operating system or embedded device, knowing those lower-level details and direct handling can help you write cleaner code. Many languages that are commonly used today, like Python, Ruby, PHP and Java, were inspired by C. Also, their libraries, compilers, and interpreters are built in C. Programming languages are tools we use to solve specific computing problems that affect us on a large scale. It owes its popularity to the rise and success of Unix, but nowadays it has gone far beyond just being the ‘native’ language of Unix.

• If the condition inside the parentheses evaluates to true, the code inside the if block will execute.
• If you are using a Unix or a Unix-like system such as macOS or Linux, you probably have the popular GNU Compiler Collection (GCC) already installed on your machine.
• In the example above, a for loop is set to iterate from 1 to 10.
• There are specific assignment operators for updating a variable by modifying the value.
• So,  if a person learns C programming first, it will help him to learn any modern programming language as well.

C forged a path for the creation of many different programming languages. Many of the modern high level programming languages that we use and love today are based on C. Before proceeding with this tutorial, you should have a basic understanding of Computer Programming terminologies.

C Arrays & Strings

In the program’s output, %i is replaced with the value of age, which is 29. Specifically, they specify the expected format of input and output. Use a float when memory usage is a concern (such as when working with a system with limited resources) or when you need to perform calculations where high precision is not critical.

Floats are a floating point value which is a number with a decimal (also called a real number), with single precision. If variables are declared outside of functions, they have global scope. Having a global scope means they are visible within the whole program and can be accessed from anywhere. When we do assign the variable a value later, there is no need to specify the data type again.

Example 5: Logical Operators

A Low-level language is specific to one machine, i.e., machine dependent. A procedural language breaks the program into functions, data structures, etc. The body of a function in the C program refers to statements that are a part of that function. It can be anything like manipulations, searching, sorting, printing, etc.

In 1970 they managed to get funding for the bigger and more powerful DEC PDP-11 that had substantially more memory. Just to give you a little excitement about C programming, I’m going to give you a small conventional C Programming Hello World program, You can try it using Demo link. VS Code and the C++ extension support Remote Development allowing you to work over SSH on a remote machine or VM, inside a Docker container, or in the Windows Subsystem for Linux (WSL). You should see output that states which versions of GCC, g++ and GDB you have installed. If this is not the case, make sure your PATH entry matches the Mingw-w64 binary location where the compiler tools are located or reference the troubleshooting section.

C Exercises – Practice Questions with Solutions for C Programming

So, when declaring a new variable in the C language, you need to define and specify what type it is, and what type of data its value holds. They are able to take different values over time as information changes during the life of the program. This line acts as a boilerplate and starting point for all C programs. It lets the computer know where to begin reading the code when it executes our programs. Whenever we make changes to our source code file, we have to repeat the process of compiling from the beginning in order to see the changes when we run the code again. This forms one big executable file with the combined machine code, a.out or hello, which represents our program.

Dennis Ritchie decided to improve upon these two previous languages, BCPL and B. He took features and characteristics from each and added additional concepts. He created a more powerful language – C – just as powerful and efficient as Assembly. This new language overcame the limitations of its predecessors and could use the power of the machine in an effective way. It was common to write operating systems using Assembly language back then.

Add Hello World source code

For example, you can change the value of age without having to specify its type again. In the example above, I declared a variable named age that will hold integer values. By storing information in a variable, you can retrieve and manipule it, perform various calculations, or even use it to make decisions in your program. Now, let’s go over the commands you need to enter to compile your main.c file. It’s called an escape sequence, which means that it is a character that creates a newline and tells the cursor to move to the next line when it sees it. Surround the text you want to display in double quotation marks, “”, and make sure it is inside the parentheses of the printf() function.