This is the C program to check whether a number is a perfect number or not. The user enters a number as input and this program checks if it a perfect number or not.
Perfect number: A perfect number is a positive integer, that is equal to the sum of its positive factors, excluding the number itself. For example, the factors or proper divisors of 6 are 1, 2, 3 and 6. If we add 1, 2 and 3(excluding 6), we get 6, the number. Therefore 6 is a perfect number.
Program: C program to check whether a number is perfect or not.
Output: Print whether perfect or not
Enter a number: 36 36 is not a perfect number!! Enter a number: 28 28 is a perfect number!!
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