C Program To Find Perfect Number
Learn How To Find Perfect Number in C Programming Language. It is important that we should know How A For Loop Works before getting further with the C Program Code. You will have to make use of Modulus Operator to Find Numbers that are Perfect in C Code.
What is a Perfect Number?
It is a Positive Integer (or Number) which is equal to the Sum of their proper Positive Divisors, excluding the Number itself.
Example
6, 496, 28, 8128
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C Program For Perfect Number using While Loop
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | #include<stdio.h> int main() { int num, sum = 0, count = 1; printf("Enter A Number:\t"); scanf("%d", &num); while(count < num) { if(num%count == 0) { sum = sum + count; } count++; } if(sum == num) printf("%d is a Perfect Number", num); else printf("%d is not a Perfect Integer", num); printf("\n"); return 0; } |
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C Program To Find Perfect Number using For Loop
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #include<stdio.h> int main() { int num, sum = 0, count; printf("Enter A Number:\t"); scanf("%d", &num); for(count = 1; count < num; count++) { if(num%count == 0) { sum = sum + count; } } if(sum == num) printf("%d is a Perfect Number", num); else printf("%d is not a Perfect Integer", num); printf("\n"); return 0; } |
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Check Perfect Number using Function in C Programming
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | #include<stdio.h> int check_perfect_number(int x) { int sum = 0, count = 1; while(count < x) { if(x%count == 0) { sum = sum + count; } count++; } return sum; } int main() { int num, result; printf("Enter A Number:\t"); scanf("%d", &num); result = check_perfect_number(num); if(result == num) printf("%d is a Perfect Number", num); else printf("%d is not a Perfect Integer", num); printf("\n"); return 0; } |
Must Read: C Program To Find Sum of Digits of an Integer
Output
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Thanks. I was looking for perfect number program in c using function. You have given so many ways to solve the perfect numbers.
We are glad that you liked the Perfect Number C Program. We have given 3 methods as we feel that it would help programming beginners to understand it in a much better way with comparison of different methods.