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Begin Your Journey with C

To initiate your learning in C, you require the following:

  • A text editor for crafting C code
  • A compiler like GCC to convert the C code into a machine-understandable language

There are various text editors and compilers to select from. For this tutorial, an IDE (Integrated Development Environment) will be used by us.

Setting up the C IDE

An IDE is a software suite that consolidates the basic tools needed to write and test the code. Popular IDEs include Code::Blocks, Eclipse, and Visual Studio which are all free to use and facilitate both the editing and debugging of C code.

Note: Although web-based IDEs can be used, they typically have more limitations compared to their desktop counterparts.

We recommend starting with Code::Blocks. The latest version can be downloaded from here.

Let's Start with C

Create your first C file by following the steps below:

  1. Open Codeblocks
  2. Go to File > New > Empty File
  3. Write the following C code and save the file as myfirstprogram.c:
#include <stdio.h>, int main() { printf("Welcome to Fynd Academy!"); return 0;}

The above code might seem incomprehensible for now, we'll break it down in later chapters. For now, concentrate on running the code.

Executing Your Code

After writing the code, it's time to run it. In Codeblocks, navigate to Build > Build and Run. Your result will look something like this:

Welcome to Fynd Academy!

Great job! You've just written and executed your first C program.

Your C Learning Journey with Fynd Academy

Learning C with Fynd Academy is facilitated by our "Practice it Yourself" tool. It concurrently illustrates the code and the outcome, simplifying every new part you learn:

#include <stdio.h>int main() { printf("Welcome to Fynd Academy!"); return 0;} Welcome to Fynd Academy!

Practice it Yourself ยป

Fynd Academy Pathfinder

Track your progress as you embark on your learning journey. Best of all, it's complimentary!

<h2>C Arrays</h2> <p>Arrays are employed to hold multiple values in a single variable, negating the need to declare independent variables for every single value.</p> <p>Creating an array involves defining the data type (like int) and specifying the array name followed by square brackets [].</p> <p>For the inclusion of values, a list separated by commas and encompassed by curly braces is used:</p> <pre> int arrayValues[] = {25, 50, 75, 100}; </pre> <p>This process creates a variable that holds an array containing four integers.</p> <h2>Access Array Elements</h2> <p>Accessing an element within an array requires referring to its index number. Remember, array indexes start at 0: [0] represents the first element, [1] the second element, and so forth. The following statement accesses the value of the initial element [0] in arrayValues:</p> <pre> int arrayValues[] = {25, 50, 75, 100}; printf("%d", arrayValues[0]); // Outputs 25 </pre> <h2>Modify an Array Element</h2> <p>To adjust the value of a specific element, refer to the index number:</p> <pre> arrayValues[0] = 33; </pre> <pre> int arrayValues[] = {25, 50, 75, 100};arrayValues[0] = 33; printf("%d", arrayValues[0]); // Now outputs 33 instead of 25 </pre> <h2>Navigating Through an Array</h2> <p>The 'for' loop allows for navigating through the elements of an array. The following example outputs all elements in the arrayValues array:</p> <pre> int arrayValues[] = {25, 50, 75, 100};int i;for (i = 0; i < 4; i++) { printf("%d\n", arrayValues[i]);} </pre> <h2>Set Array Size</h2> <p>Another common method of creating arrays involves specifying the array's size and adding elements subsequently:</p> <pre> // Declare an array of four integers:int arrayValues[4];// Add elementsarrayValues[0] = 25;arrayValues[1] = 50;arrayValues[2] = 75;arrayValues[3] = 100; </pre> <p>Using this method demands knowing the number of array elements beforehand to store adequate memory. It should be noted that the array's size cannot be changed after its creation.</p> <h2>C Exercises</h2> <p>Exercise yourself with this activity:</p> <p>Exercise: Create an array of type 'int' named 'arrayValues'.</p> <pre> {25, 50, 75, 100}; </pre>