Learn C programming easily with our simple Online C Compiler. Write, compile, and run your C code. You are also welcome to practice with our sample C programs for hands-on experience in a user-friendly environment.
C Programming Compiler to Run Code on the fly
Please wait for a while till the online c programming compiler appears just below.
Copy and paste the following code to get started with your first online C programming code.
#include <stdio.h>
#define GREETING1 "********TechBeamers Online C Programming Compiler********"
#define GREETING2 "Hello! Welcome to Your First C Program"
int main() {
printf("\n%s\n", GREETING1);
printf("\n%s\n", GREETING2);
return 0;
}Please feel free to report issues in running code or using the above compiler. That’s how we’ll know what to fix or improve. Thanks for reading this note.
10 Most Basic Yet Intuitive C Programs for Beginners
Now, if you wish to speed up your efforts to learn C Programming, then read and run the below coding snippets. We have tried to enrich every single C program to help you learn a specific C language feature.
Please note that turn on the above C code compiler’s “Interactive Mode:”. Also, when you have to supply multiple inputs, type them one after the other by separating them using a space.
// Entering multiple input values by separating them using a space...
// 11 13 21 23 31 33 41 43 51 53 and now press enter.It is true as long as you are not being prompted with a different message for the inputs.
Program 1: Hello World with a Twist
This unique “Hello World” program not only prints the traditional message but also introduces a variable to hold your name, prompting user interaction.
#include <stdio.h>
int main() {
char name[20];
printf("Enter your name: ");
scanf("%s", name);
printf("Hello, %s! Welcome to the world of C programming.\n", name);
return 0;
}Copy the above code and paste it into our online c programming compiler. Run the code, check the results, and try to rewrite the logic in your style.
Explanation:
- This program adds user interaction, prompting them to enter their name.
- It demonstrates the use of character arrays for string input, enhancing the basic “Hello World” experience.
Program 2: Interactive Calculator
Explore basic arithmetic operations with this interactive calculator. Users input two numbers, and the program performs addition, subtraction, multiplication, and division.
#include <stdio.h>
int main() {
float num1, num2;
printf("Enter two numbers: ");
scanf("%f %f", &num1, &num2);
printf("Sum: %.2f\n", num1 + num2);
printf("Difference: %.2f\n", num1 - num2);
printf("Product: %.2f\n", num1 * num2);
printf("Quotient: %.2f\n", num1 / num2);
return 0;
}Copy the code above, paste it into our online C programming compiler, and execute. Observe the results, then reimagine the logic in your unique style.
Explanation:
- This program goes beyond simple arithmetic by involving user input.
- It introduces the use of floating-point variables for more precise calculations.
Program 3: Odd or Even Game
Enhance your conditional statement skills by creating an interactive “Odd or Even” game. Users enter a number, and the program determines its parity.
#include <stdio.h>
int main() {
int intVal;
printf("Let's play the Odd or Even game! \n\nEnter a value: ");
scanf("%d", &intVal);
if ((intVal & 1) == 0) {
printf("%d is an even numeral.\n", intVal);
} else {
printf("%d is an odd numeral.\n", intVal);
}
return 0;
}Take the provided code, input it into our online C programming compiler, and run the program. Examine the output, then creatively restructure the logic in your way.
Explanation:
- This program introduces a simple game concept, making learning about conditional statements more engaging.
- Users input a number, and the program provides immediate feedback on its parity.
Program 4: Countdown Loop
Move beyond basic loops with this countdown program. Users input a starting number, and the program counts down to 1.
#include <stdio.h>
int main() {
int start;
printf("Enter a starting number for the countdown: ");
scanf("%d", &start);
for (int i = start; i >= 1; i--) {
printf("%d ", i);
}
printf("\nBlast off!\n");
return 0;
}Replicate the existing code, transfer it to our online C compiler, and execute. Evaluate the output and transform the logic according to your thinking.
Explanation:
- This program introduces a countdown loop, emphasizing the use of
forloops for a specific range of values. - Users can input the starting number, adding an interactive element to the learning experience.
Program 5: Dynamic Array Input
Dive into arrays by creating a program that dynamically takes user input to populate an array. The array size is determined at runtime.
#include <stdio.h>
int main() {
int size;
printf("Enter the size of the array: ");
scanf("%d", &size);
int numbers[size];
printf("Enter %d numbers for the array: ", size);
for (int i = 0; i < size; i++) {
scanf("%d", &numbers[i]);
}
printf("Array elements: ");
for (int i = 0; i < size; i++) {
printf("%d ", numbers[i]);
}
printf("\n");
return 0;
}Utilize the code above by pasting it into our online C programming compiler. Execute the program, review the results, and reimagine the logic to reflect your coding style.
Explanation:
- This program introduces dynamic array creation based on user input, providing a hands-on experience with arrays.
- It emphasizes the flexibility and adaptability of arrays in C programming.
Program 6: Function-Driven Calculator
Extend your understanding of functions by creating a modular calculator program. Functions handle different operations, promoting code organization.
#include <stdio.h>
int add(int a, int b) {
return a + b;
}
int subtract(int a, int b) {
return a - b;
}
int multiply(int a, int b) {
return a * b;
}
int divide(int a, int b) {
return a / b;
}
int main() {
int num1, num2;
printf("Enter two numbers: ");
scanf("%d %d", &num1, &num2);
printf("Sum: %d\n", add(num1, num2));
printf("Difference: %d\n", subtract(num1, num2));
printf("Product: %d\n", multiply(num1, num2));
printf("Quotient: %d\n", divide(num1, num2));
return 0;
}Utilize the code above, input it into our online C compiler, and execute. Evaluate the outcomes, then transform the logic to echo your distinct coding style.
Explanation:
- This program introduces modular programming by utilizing separate functions for different arithmetic operations.
- It highlights the importance of breaking down complex tasks into smaller, manageable functions.
Program 7: String Reversal
Explore strings in C by creating a program that reverses a user-inputted string.
#include <stdio.h>
#include <string.h>
int main() {
char input[50];
printf("Enter a string: ");
scanf("%s", input);
printf("Original: %s\n", input);
printf("Reversed: ");
for (int i = strlen(input) - 1; i >= 0; i--) {
printf("%c", input[i]);
}
printf("\n");
return 0;
}Copy the code above, place it into our online C programming compiler, and run the program. Evaluate the results, then redesign the logic in a manner that suits your unique style.
Explanation:
- This program delves into string manipulation by reversing a user-inputted string.
- It demonstrates the use of the
strlenfunction for finding the length of a string and iterating through the characters in reverse order.
Program 8: Pointer Magic
Introduce the concept of pointers by creating a program that swaps the values of two variables using pointers.
#include <stdio.h>
void swap(int *a, int *b) {
int temp = *a;
*a = *b;
*b = temp;
}
int main() {
int num1 = 5, num2 = 10;
printf("Before swapping: num1 = %d, num2 = %d\n", num1, num2);
swap(&num1, &num2);
printf("After swapping: num1 = %d, num2 = %d\n", num1, num2);
return 0;
}Copy and paste the code into our online C programming compiler, execute it, and assess the results. Then, reconstruct the logic in a style that aligns with your individual preferences.
Explanation:
- This program introduces pointers by demonstrating how to swap values between two variables.
- It emphasizes the power of pointers in manipulating values indirectly and altering the state of variables.
Here are two additional C programs to complement the earlier list:
Program 9: Factorial Calculator
Explore the concept of recursion by creating a program that calculates the factorial of a given number.
#include <stdio.h>
int factorial(int n) {
if (n == 0 || n == 1) {
return 1;
} else {
return n * factorial(n - 1);
}
}
int main() {
int num;
printf("Enter a number to calculate its factorial: ");
scanf("%d", &num);
printf("Factorial of %d is: %d\n", num, factorial(num));
return 0;
}Copy and paste the code into our online C compiler, run the script, and assess the results. Subsequently, transform the logic in a manner that resonates with your coding style.
Explanation:
- This program introduces the concept of recursion by calculating the factorial of a user-inputted number.
- It demonstrates the application of a function calling itself to solve a problem.
Program 10: Prime Number Checker
Enhance your understanding of loops and conditional statements by creating a program that checks whether a given number is prime.
#include <stdio.h>
int isPrime(int num) {
if (num <= 1) {
return 0;
}
for (int i = 2; i * i <= num; i++) {
if (num % i == 0) {
return 0;
}
}
return 1;
}
int main() {
int num;
printf("Enter a number to check if it's prime: ");
scanf("%d", &num);
if (isPrime(num)) {
printf("%d is a prime number.\n", num);
} else {
printf("%d is not a prime number.\n", num);
}
return 0;
}Copy the code snippet, input it into our online C programming compiler, and run the script. Examine the outcomes, then reconstruct the logic to reflect your unique coding perspective.
Explanation:
- This program checks whether a user-inputted number is prime, utilizing loops and conditional statements.
- It introduces the concept of a prime number and demonstrates efficient prime checking using a loop.
These unique programs provide an engaging and innovative approach to learning C programming for beginners, covering a range of fundamental concepts. Each program builds on the previous one, reinforcing key concepts in a progressively challenging manner.
Happy coding!