C Programming Practice: Loops, Series & Number Manipulation

This repository contains a collection of fundamental C programming exercises focused on loops, mathematical series, and number manipulation. These problems are excellent for practicing logic, problem-solving, and algorithmic thinking in C.

🛠️ Recommended Environment

• Compiler: GCC (GNU Compiler Collection)
• Code Editor: Visual Studio Code (VS Code) with the C/C++ extension is highly recommended for writing and debugging these programs.

📋 List of Problems

Basic Loop Iterations

1. Take a number n from the keyboard. Print the numbers from 0 to n.
2. Take a number n from the keyboard. Print the even numbers from 2 to n.
3. Take a number n from the keyboard. Print the odd numbers from 1 to n.
4. Take a number n from the keyboard. Print the numbers from 0 to n which are a multiple of another number, x. (For example, if n=10 and x=2, then the output numbers are 0, 2, 4, 6, 8, and 10).
5. Take an integer number from the keyboard. Print its multiplication table.

Mathematical Series (Step-by-Step, without direct formulas)

6. Input the value of n. Then solve the following series: 1 + 3 + 5 + …… + (2n-1)
7. Input the value of n. Then solve the following series: 2 + 4 + 6 + …… + 2n
8. Input the value of n. Then solve the following series: 12 + 32 + 52 + …… + (2n-1)2
9. Input the value of n. Then solve the following series: 22 + 42 + 62 + …… + (2n)2
10. Input the value of n. Then solve the following series: 1 + 1/2 + 1/3 + …… + 1/n
11. Input the value of n. Then solve the following series: 1 + 1/22 + 1/32 + …… + 1/n2
12. Input the value of n. Then solve the following series: 1 + 1/3 + 1/5 + …… + 1/(2n-1)
13. Input the value of n. Then solve the following series: 1/22 + 1/42 + 1/62 + …… + 1/(2n)2

Number & Digit Manipulation

14. Find the factorial of a given number, n.
15. Find the sum of all constituent digit(s) of a taken integer number from the keyboard.
16. The numbers in the sequence 1, 1, 2, 3, 5, 8, 13, 21…… are called Fibonacci numbers. Use a loop structure to calculate and print the first m Fibonacci numbers.
17. Write a C program to count the number of digits in a number.
18. Write a C program to find the first and last digit of a number.
19. Write a C program to find the sum of the first and last digit of a number.
20. Write a C program to calculate the sum of digits of a number.
21. Write a C program to calculate the product of digits of a number.
22. Write a C program to enter a number and print its reverse.
23. Write a C program to check whether a number is a palindrome or not.
24. Write a C program to find the power of a number using a loop.
25. Write a C program to check whether a number is a Prime number or not.
26. Write a C program to check whether a number is an Armstrong number or not.

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Happy Coding!