A perfect number is a positive integer that is equal to the sum of its proper divisors (excluding itself). For example, 6 is a perfect number because its proper divisors (1, 2, 3) add up to 6.
Here’s an example Kotlin program that finds perfect numbers:
fun main() {
(1..1000).filter { isPerfectNumber(it) }.forEach { println("$it is a perfect number") }
}
fun isPerfectNumber(number: Int): Boolean {
return (1..number / 2).filter { number % it == 0 }.sum() == number
}This code defines two functions: main() and isPerfectNumber(). The main() function is responsible for printing all perfect numbers from 1 to 1000. A perfect number is a positive integer that is equal to the sum of its positive divisors. For example, 6 is a perfect number because 1 + 2 + 3 + 6 = 12.
The isPerfectNumber() function takes an integer number as input and returns true if number is a perfect number, and false otherwise. The function calculates the sum of the divisors of number and checks if it is equal to number.
When we run the program, it will output all the perfect numbers up to the limit we set:
6 is a perfect number
28 is a perfect number
496 is a perfect numberIf this project help 💁 you, Can you give me a cup of coffee? ☕
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