10 fundamental programs in C

Mastering the Basics: 10 Essential C Programs for Beginners 🚀

Hello aspiring coders! Today, we embark on an exciting journey into the world of C programming, exploring 10 fundamental programs that lay the foundation for your coding adventure. 🌐💻

1. Hello World 👋

c
#include <stdio.h>

int main() {
    printf("Hello, World!\n");
    return 0;
}

Our first program introduces you to the tradition of coding with a simple greeting.

2. Sum of Two Numbers ➕

c
#include <stdio.h>

int main() {
    int num1 = 5, num2 = 7, sum;

    sum = num1 + num2;

    printf("Sum: %d\n", sum);
    return 0;
}

Learn how to declare variables and perform basic arithmetic operations.

3. Even or Odd? 🧮

c
#include <stdio.h>

int main() {
    int num;

    printf("Enter a number: ");
    scanf("%d", &num);

    if (num % 2 == 0) {
        printf("%d is even.\n", num);
    } else {
        printf("%d is odd.\n", num);
    }

    return 0;
}

Delve into conditional statements with a program that checks if a number is even or odd.

4. Factorial Fun! 🔄

c
#include <stdio.h>

int main() {
    int num, factorial = 1;

    printf("Enter a number: ");
    scanf("%d", &num);

    for (int i = 1; i <= num; ++i) {
        factorial *= i;
    }

    printf("Factorial: %d\n", factorial);
    return 0;
}

Get hands-on with loops and calculate the factorial of a number.

5. Fibonacci Magic 🌈

c
#include <stdio.h>

int main() {
    int n, first = 0, second = 1, next;

    printf("Enter the number of terms: ");
    scanf("%d", &n);

    printf("Fibonacci Series: ");

    for (int i = 0; i < n; ++i) {
        printf("%d, ", first);
        next = first + second;
        first = second;
        second = next;
    }

    return 0;
}

Unravel the mysteries of loops and recursion with the Fibonacci series.

6. Prime Checker 🔍

c
#include <stdio.h>
#include <stdbool.h>

bool isPrime(int n) {
    if (n <= 1) {
        return false;
    }
    for (int i = 2; i * i <= n; ++i) {
        if (n % i == 0) {
            return false;
        }
    }
    return true;
}

int main() {
    int num;

    printf("Enter a number: ");
    scanf("%d", &num);

    if (isPrime(num)) {
        printf("%d is prime.\n", num);
    } else {
        printf("%d is not prime.\n", num);
    }

    return 0;
}

Discover the magic of functions while checking if a number is prime.

7. Palindrome Checker 🔄

c
#include <stdio.h>
#include <stdbool.h>
#include <string.h>

bool isPalindrome(char str[]) {
    int len = strlen(str);

    for (int i = 0; i < len / 2; ++i) {
        if (str[i] != str[len - i - 1]) {
            return false;
        }
    }
    return true;
}

int main() {
    char word[100];

    printf("Enter a word: ");
    scanf("%s", word);

    if (isPalindrome(word)) {
        printf("%s is a palindrome.\n", word);
    } else {
        printf("%s is not a palindrome.\n", word);
    }

    return 0;
}

String manipulation comes alive with a palindrome-checking program.

8. Square and Cube Generator 🔄

c
#include <stdio.h>

int main() {
    int n;

    printf("Enter the number of terms: ");
    scanf("%d", &n);

    printf("Number\tSquare\tCube\n");

    for (int i = 1; i <= n; ++i) {
        printf("%d\t%d\t%d\n", i, i * i, i * i * i);
    }

    return 0;
}

Enhance your loop skills with a program generating squares and cubes.

9. Simple Calculator ➗

c
#include <stdio.h>

int main() {
    char operator;
    double num1, num2;

    printf("Enter an operator (+, -, *, /): ");
    scanf(" %c", &operator);

    printf("Enter two numbers: ");
    scanf("%lf %lf", &num1, &num2);

    switch (operator) {
        case '+':
            printf("Result: %.2lf\n", num1 + num2);
            break;
        case '-':
            printf("Result: %.2lf\n", num1 - num2);
            break;
        case '*':
            printf("Result: %.2lf\n", num1 * num2);
            break;
        case '/':
            if (num2 != 0) {
                printf("Result: %.2lf\n", num1 / num2);
            } else {
                printf("Error! Division by zero.\n");
            }
            break;
        default:
            printf("Error! Invalid operator.\n");
    }

    return 0;
}

Bring math to life with a simple calculator program using switch statements.

10. Pattern Printer 🌟

c
#include <stdio.h>

int main() {
    int rows;

    printf("Enter the number of rows: ");
    scanf("%d", &rows);

    for (int i = 1; i <= rows; ++i) {
        for (int j = 1; j <= i; ++j) {
            printf("* ");
        }
        printf("\n");
    }

    return 0;
}

Wrap up your C journey with a visual treat – a program that prints beautiful patterns.

Congratulations, young coder! You've taken your first steps into the captivating world of C programming. Each program is a stepping stone, paving the way for your coding odyssey. Keep exploring, keep coding! 🚀💻 #CProgramming #CodingJourney #ProgrammingMagic