C Programming Functions Quiz

Questions and Answers

What does the function `palindrome` primarily check for?

If a number is an Armstrong number

If a number is even

If a number is the same when reversed (correct)

If a number is a prime number

Which of the following statements about the `prime` function is true?

It checks if a number is even.

It compares the number with 1 to check for primality.

It counts from 2 to the input number to check factors. (correct)

It has no conditions to validate primality.

What is the output of the `palindrome` function if the input is 121?

Error in the function

It isn't a Palindrome

It is a Palindrome (correct)

Output is undefined

In the `rev` function, what is the purpose of the loop?

<p>To print the reverse of the number</p> Signup and view all the answers

What condition does the `c == n` check in the last function related to the Armstrong number?

<p>To verify if the total of cubes equals the original number</p> Signup and view all the answers

Study Notes

Palindrome Function

Checks if a number is a palindrome by reversing its digits.
Initializes a to the original number and r to 0 to hold the reversed number.
Uses a loop to extract each digit: multiplies r by 10 to shift digits and adds the last digit of n using n % 10.
Compares the reversed number r with the original number a to determine if it is a palindrome.
Outputs "It is a Palindrome" if true, otherwise outputs "It isn't a Palindrome".

Prime Function

Intended to check if a number is prime starting from i = 2.
Uses a for loop to iterate from 2 to n-1 for divisibility checking.
An individual number is considered prime if it has no divisors other than 1 and itself.

Armstrong Function

Checks if a number is an Armstrong number (sum of its digits raised to the power of the number of digits equals the number itself).
Initializes c to zero for accumulating the sum of digits raised to the third power.
The loop processes each digit using modulus and division operations to sum them up.
Compares the calculated sum c with n for validation.
Outputs "Armstrong No." if they are equal, otherwise outputs "Not Armstrong".

Reverse Function

Intended to print the reverse of a number.
Uses a loop to extract each digit from the number n through division.
Outputs each digit as it is processed, indicating the result as "Reverse: ".

Description

Test your knowledge on C programming functions related to palindrome, prime numbers, and Armstrong numbers. This quiz covers key concepts and implementation strategies for numerical manipulation in C. Challenge yourself to understand these fundamental programming tasks.