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There is a slight mistake on the logic of Armstrong, it will be 1634 = (1^4 + 6^4 + 3^4 + 4^4), basically digits raised to the power count of digits, so sum = sum + pow(ld, cntDigits) will be the change, where the cntDigits is the number of digits.
Notes:
Count Digits: https://takeuforward.org/data-structure/count-digits-in-a-number/
Reverse a Number: https://takeuforward.org/c-programs/reverse-a-number-in-c/
Check Palindrome: https://takeuforward.org/data-structure/check-if-a-number-is-palindrome-or-not/
Gcd or HCF: https://takeuforward.org/data-structure/find-gcd-of-two-numbers/
Armstrong Number: https://takeuforward.org/maths/check-if-a-number-is-armstrong-number-or-not/
Print all Divisors: https://takeuforward.org/data-structure/print-all-divisors-of-a-given-number/
Check for prime: https://takeuforward.org/data-structure/check-if-a-number-is-prime-or-not/
Submit the problems here:
Count Digits: https://bit.ly/3X17nIr
Reverse Number: https://bit.ly/3vCeBXS
Palindrome: https://bit.ly/3vylgCi
Armstrong: https://bit.ly/3vBfkbD
Print Divisors: https://bit.ly/3vzQ7yr
Check Prime: https://bit.ly/3ZdiWOO
HCF/GCD: https://bit.ly/3GB4Mj8
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