## How do you code a perfect number in Java?

Find the factors of the given number (n) by using a loop (for/ while). Calculate the sum of factors and store it in a variable s. Compare the sum (s) with the number (n): If both (s and n) are equal, then the given number is a perfect number.

### How do you write a perfect number in C?

Using while Loop

- /*Create a C Program to find the perfect number using while loop*/
- #include
- #include
- void main()
- {
- int i = 1, num, Sum = 0;
- printf(” Enter any number to check Perfect Number \n”);
- scanf(“%d”, &num);

#### How do you check a number is perfect or not in C?

Logic to check Perfect number

- Input a number from user.
- Initialize another variable to store sum of proper positive divisors, say sum = 0 .
- Run a loop from 1 to num/2 , increment 1 in each iteration.
- Inside the loop if current number i.e. i is proper positive divisor of num , then add it to sum .

**How do you write a perfect number Program?**

- Program 1. #include int main(){ int n,i=1,sum=0; printf(“Enter a number: “); scanf(“%d”,&n);
- Result. Enter a number: 6 6 is a perfect number.
- Program 2. C program to print perfect numbers from 1 to 100. int main(){ int n,i,sum; printf(“Perfect numbers are: “); for(n=1;n<=100;n++){
- Result. Perfect numbers are: 6 28.

**Is perfect method Java?**

This is the assignment: An integer number is said to be a perfect number if its factors, including 1 (but not the numbers itself), sum to the number. For example,6 is a perfect number, because 6=1+2+3. Write method Perfect that determines whether number is a perfect number.

## Is 28 a perfect number?

perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.

### What is strong number in C?

Strong number is a number whose sum of all digits’ factorial is equal to the number ‘n’. Factorial implies when we find the product of all the numbers below that number including that number and is denoted by ! (Exclamation sign), For example: 4! = 4x3x2x1 = 24.

#### Is perfect square algorithm?

This method is based on very important thing about perfect square: If integer number K is divided to any integer number b with modulo r (so K%b = r ) then K2 and r2, divided by b will result in same modulo. return tst*tst == n; -i.e. testing that n is perfect square by calculating it’s square root.

**What is a data structure in C?**

Data Structures in C are used to store data in an organised and efficient manner. The C Programming language has many data structures like an array, stack, queue, linked list, tree, etc. A programmer selects an appropriate data structure and uses it according to their convenience.

**What is palindrome number in C?**

Palindrome number in c: A palindrome number is a number that is same after reverse. For example 121, 34543, 343, 131, 48984 are the palindrome numbers.

## How many perfect numbers are there?

There are around 51 known perfect numbers. There are only 2 perfect numbers from 1 to 100 which are 6 and 28. The latest perfect number was discovered in 2018 which has 49,724,095 digits.

### Is 6 a perfect number?

#### How to calculate perfect number in Java?

Perfect Number in Java. Any number can be a Java Perfect Number if the sum of its positive divisors excluding the number itself is equal to that number. For example, 28 is a perfect number because 28 is divisible by 1, 2, 4, 7, 14 and 28 and the sum of these values is 1 + 2 + 4 + 7 + 14 = 28. Remember, we have to exclude the number itself.

**How to write first Java program?**

IntelliJ IDEA First Java Program. In this, we will create our first Java Project. We are going to write and execute Hello World program. 1. Create Project. Start IntelliJ IDE. Go to File-> New-> Project. The below screen appears. Select The Java Project and appropriate Project SDK. Click Next. Now, Type the Project name and select Project location.

**What are the basic Java programs?**

Java Program to calculate the Difference between the Sum of the Odd Level and the Even Level Nodes of a Binary Tree

## How do you find prime number in Java program?

Find Prime Numbers Between 1 to n. 1) We are finding the prime numbers within the limit. 2) Read the ānā value using scanner object sc.nextInt ()and store it in the variable n. 3) The for loop iterates from j=2 to j=given number. then count assigned to 0, the inner loop finds the divisors of each j value, count value represents no.of divisors.