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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!

C Arrays Arrays Arrays are used for storing multiple values in a single variable, rather than having separate variables for each value. To create an array, define the data type (like int) and give the array a name followed by square brackets []. Values are inserted into the array via a comma-separated list inside curly braces. ``` int valuesList[] = {25, 50, 75, 100}; ``` This has created a variable that holds an array of four integers. Accessing Array Elements Array elements can be accessed by referring to their index number. Array indexing begins with 0: [0] is the first element, [1] is the second element, and so on. The following statement accesses the first element [0] in valuesList: Example ```html int valuesList[] = {25, 50, 75, 100}; printf("%d", valuesList[0]); //Outputs 25 ``` Changing Array Element To change an element's value, refer to the element's index number: Example ```html valuesList[0] = 33; ``` Example ```html int valuesList[] = {25, 50, 75, 100}; valuesList[0] = 33; printf("%d", valuesList[0]); // Now outputs 33 instead of 25 ``` Looping Through an Array A 'for' loop can be used to go through all the elements in the valuesList array: Example ```html int valuesList[] = {25, 50, 75, 100}; int i; for (i = 0; i < 4; i++) { printf("%d\n", valuesList[i]);} ``` Setting Array Size Another common method is to determine the size of the array, and then add elements later: Example ```html // Declare an array of four integers: int valuesList[4]; // Add elements valuesList[0] = 25; valuesList[1] = 50; valuesList[2] = 75; valuesList[3] = 100; ``` You have to know the number of array elements in advance when you use this method, as it informs the program how much memory it needs to store. Once an array is created its size cannot be changed. C Exercises Test Yourself With Exercises Exercise: Create an array of type int called valuesList. ```html {25, 50, 75, 100}; ``` Start the Exercise Pathfinder