In Python, to check whether the number is a perfect square or not, use the power operator " ** " with exponent as 0.5 and also modulus operator " % " to get the remainder. This python program checks whether a given number is perfect number or not. Python Program to find Perfect Number using While loop. Therefore 6 is a perfect number. Make sure that we have to exclude the number when we are calculating the sum of divisors. Sum of divisors is: 1+2+4+7+14=28. Iterator from 2 to number -1 using for loop. In python for squaring a number added two stars (**). Some of the perfect numbers are 6, 28, 496, 8128 and 33550336 so on. Example: A perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. The addition of all the squared numbers is known as the sum of squares. Calculate the power of n for each individual and add them. That is, the number 6 has divisors 1, 2, and 3 (excluding 6 itself). To check if a number is perfect or not, we have two approaches. Example. First of all, we will ask the user to input an integer which will be stored in . Hence 6 is a perfect number. Next, this program will check whether the number is Perfect number or not using the Java For Loop. 2. A Python for loop iterates over an object until that object is complete. If it doesn't, then do nothing. What is perfect number? For example - Factorial of -19 is not defined as its negative while factorial of 4 will be defined as 4 * 3 * 2 * 1 = 24. We used a for loop to sum the numbers in a list. The internal loop will print the number of times you want to print the number. Python Program to find Perfect Number using For loop This Python program for Perfect Number allows the user to enter any number. The for loop uses the syntax: for item in object, where "object" is the iterable over which you want to iterate. You can change this range as per your need. To sum in a for loop in Python: Declare a new variable and set it to 0. Working: First the computer reads the positive integer value from the user. Both of them work by following the below steps: 1. You should have knowledge of the following topics in python programming to understand these programs: Python input() function; Python int() function; Python for loop statement; Python while loop statement; Python if . Perfect Number: A perfect number is the sum of factors of the given number that is equal to twice the number. In Python, anything received using input() treated as a string type value. For example, we will take 6 as a number and its divisors are 1, 2, and 3 excluding itself so the sum of its divisors i.e., 1+2+3= 6. Consider the following example: appropriate divisors of 6 are 1, 2, 3. In number theory, a perfect number can be defined using two definitions. A loop in Python is used to iterate over a sequence (list, tuple, string, etc.) . Using a while loop with math factorial function, calculate the factorial of each of the digits in the number. The first approach is a naive approach where the time complexity is O (n2) since we are iterating "j" times for each "i" and checking for its divisors. This is less like the for keyword in other programming languages, and works more like an iterator method as found in other object-orientated programming languages. For example: n = 6. User Entered value for this Python Program to find Strong Number = 145 and Sum = 0. For instance, you can iterate over the contents of a list or a string. The square pattern is very simple to create using python. Perfect Number in Python - This Python programming tutorial will explain what is a perfect number with examples. The first step is to declare a new variable and initialize it to 0. Flow Diagram - Python For Loop. The dry run of above program with user input 12, goes like:. Please Enter the Maximum Value : 20 2 4 6 8 10 . Any number is perfect if it equals the sum of its positive divisors, excluding the actual number itself. # Python Program to Print Even Numbers from 1 to N maximum = int (input (" Please Enter the Maximum Value : ")) for number in range (2, maximum+1, 2): print (" {0}".format (number)) Python Even numbers output. A perfect number is a number that is equal to the sum of its positive divisors, excluding the number itself. #Use Python code to see if numbers are perfect cubes. Check the condition. Check Perfect Number using for Loop Simple example code finds Sum of N Natural Numbers using While Loop, For Loop, and Functions. Assume we wanted to print all perfect numbers from 1 to 100 Here we will iterate the first 100 numbers using a while loop In each iteration of the outer while loop, the inner for loop execute from 1 up to the current outer number to check if the current number is a perfect number. To check whether a given number is a prime number or not in Python, you have to ask from user to enter the number, then check and print the message as shown in the program given below: The question is, write a Python program to check prime number . [code]for i in range(100): myFile = open(f"file_{i + 1}.txt", "w") myFile.write("Hello . If i < num is true and num % i == 0 is false, the while loop will run infinitely. Note: To find the factors of another number, change the value of num. If False, come out of the loop. There is "for" loop which is similar to each loop in other languages. are all prime numbers. Loops allow you to repeat similar operations in . Some other perfect numbers are 6, 496, 8128 etc. For example, 153 is an Armstrong number because. Then using For loop it calculates the sum of positive divisors. And update the iterator/ the value on which the condition is checked. So num=12, and i=1; Now the condition (of while loop) i<=num or 1<=12 evaluates to be true . 2 1. The sum of those divisors are 1 + 2 + 3 = 6 that is . Strong Number in Python using Function. By using while loop. List of . A loop in python is a sequence of statements that are used to execute a block of code for a specific number of times. In while loop if variable index is less than equal to number then print statement executed square root of that number. Now, we will see what are the steps involved in determining the perfect number. Perfect Number Program in Java using For Loop This Java program for Perfect Number allows the user to enter any number. Input: n = 15 Output: false Divisors of 15 are 1, 3 and 5. 4. When the for loop completes it compares the sum to the numb to determine if the numb is abundant, deficient, or perfect. You need to use 2 nested loops to create a square pattern. When a number is equal to the sum of all of its positive divisors except itself, it is said to be a Perfect Number. In this Python program, you will learn to find whether it is a perfect number or not using for loop, while loop, and functions. A perfect number is a number in which the sum of the divisors of a number is equal to the number. In Python, there is no C style for loop, i.e., for (i=0; i<n; i++). Use if statement To check the sum of the factorials of the digits is equal to the by user-entered number. en.wikipedia.org/wiki/Abundant_number#Related_concepts - dvdktn Oct 15, 2016 at 23:45 Add a comment | 2 Answers The loop will continue until the condition (j<=no/2) is false. In simple words, a number is considered to be perfect if its sum of divisors equals the number. A number is said to be a perfect number if it is equal to the sum of its divisors. First While Loop - First Iteration. Temp = Number. Example sum of n numbers in Python using for loop. Positive divisors of 6 except itself are 1, 2 and 3. The outer loop will execute the internal loop for the number of times you want. Code 1. def square(num) : sum = 0 for i in range(1 . Method 1: For Loop Iteration between [1, num] For number num Initialise sum = 0 Run an in 'i' iteration b/w [1, num] For any i satisfying (num % i == 0) If sum == num, its a perfect number Add to the sum Let's implement the above mentioned logic in Python Language. Steps Involved to Check Whether the Given Number Is the Perfect . A perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. 3. Python Program. 5. Perfect Number Program in Python using While loop In the given example, we ask the user to enter any number. After the user input number calculates the sum of natural numbers from 1 to user-specified value using For Loop. For example, factors of '6' are '1', '2', '3' and '6'. In the below code, you can see that random number ranges between 0 to 10. You can verify this by using a print statement inside the while loop. Finally if-else condition is used to print the number is perfect number or not . For example, if we need the sum of squares of the first 10 natural numbers. Temp = 145. In the function, we use the for loop to iterate from i equal to x. Count the total individual digits (For Example, 370 means 3). Below is the demonstration of the same . Related: C program to find Perfect Number or Not using While Loop. # More complex example for i in [1, 3, 5, 7, 9]: x = i**2 - (i-1)* (i+1) print (x, end=", ") # prints 1, 1, 1, 1, 1, When the values in the array for our for loop are sequential, we can use Python's range () function instead of writing out . . This is going to be a command-line-based game. Check Prime Number using for Loop. Python Program to Check Perfect Number using While Loop Inside the checkPerfectNumbr () function Take a variable to say totalSum and initialize it to 1. Initial value, num = "12" (entered by user). Example 5: For Loop with Set. To define a function using a for loop to find the factorial of a number in Python, we just need loop from the number n to 1, subtracting 1 from n each time, and update the cumulative product of the numbers in each step of the loop. Steps to Find Perfect Number Read or initialize a number (n). Example. Next, the sum of all the factorials of the digits. First, we will take input using an integer and store them in a variable. if it is not equal to zero then enter into the loop and find the reminder of number ex: 153%10 gives reminder 3. You can imagine a loop as a tool that repeats a task multiple times and stops when the task is completed (a condition satisfies). A number which is equal to sum of it's divisors is known as perfect number. 1 What is perfect number? Now, it enters into the Python inner or Nested While loop. Reassign the variable to its value plus the current number. For example, 1^3 + 5^3 + 3^3 equals 153 for a given integer. Example 1: Python For Loop with Range. Both are the same so '6' is a perfect number. We have created GUI based game in the next section. 1 7. Then and only then the factors are added to sum. Like this: while (i < num): if num % i == 0: sum1 = sum1 + i i = i + 1 print ('Passed the if statement') If Passed the if statement gets printed multiple times then num % i == 0 is false and the . The for loop in Python is used to iterate over a sequence (list, tuple, string) or other iterable objects. myList = ['pineapple', 'banana', 'watermelon', 'mango'] for element in myList: print(len(element)) Run. In this example, we will take a list of strings, and iterate over each string using for loop, and print the string length. The answer to this question, is the program given below: In the next step add the cube of a number to the sum1 (3*3*3). It will check and return the output as true or false respectively. There are two types of loops in Python and these are for and while loops. Perfect Number Example: 28 is perfect number since its divisors are 1, 2, 4, 7 and 14. Integral divisors of 6 are 1,2,3 and 6, we can observe that 1+2+3=6. The factors of a number are defined as numbers that divided the original number without leaving any remainder (left reminder = 0). And the sum of all these numbers gives the number itself. 1) move the code in the function to the first part of the while loop. In this example we print the result of a small computation based on the value of our iterator variable. The second argument ( stop) which is required, is where the sequence should end and is not inclusive, as mentioned earlier. Other perfect numbers are 28, 496, and 8,128. Next, we initialise the n_sum to 0 and i to 1. That is: 28 = 1+2+4+7+14 = 14+14 = 28 Therefore 28 is a perfect number. Syntax - Python For Loop. In this tutorial, we will discuss different ways to check whether a number is a perfect number in python. This program allows users to enter any integer value. Factorial = 1, i = 1. for an example let us consider a number 6. Finding Factorial of a Number in Python Using Loops. The Source . Definition 1: A positive integer which is equal to the sum of its all positive divisors (excluding itself) can be termed as a perfect number. Let us learn how to use for in loop for sequential traversals. Using for loop : Random method is used to generate random number that player need to guess inorder to win the game. . By using function 5 3. except error (using try-except) if user input wrong data. Now let's move on to the program given below. Example 6: For Loop with String. Check Perfect Number using for Loop The question is, write a Java program to check whether a number entered by user at run-time, is a perfect number or not using for loop. Perfect Number. We'll discuss the above-mentioned methods in detail in the upcoming sections. our task is to find all the perfect squares number in the given range by the user. We iterate the loop till the value of i is less than the entered number. 9 6 10 5 Example 2: Python List For Loop- Over List of Numbers If it divides, add the counter to the sum. A perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. Python Program to Find Perfect Number between 1 to 100 or N. Python Program to find Perfect Number using For loop Take input from the user. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Divide the given integer into individual digits (For Example, Divide 370 into 3, 7, and 0). Printing numbers square using while loop. Python For loop is used for sequential traversal i.e. In the while loop, we need to follow some steps as follows. James Gallagher - January 04, 2021. it is used for iterating over an iterable like String, Tuple, List, Set or Dictionary. For Example, 6 has divisors 1, 2 and 3 (excluding itself), and 1 + 2 + 3 = 6, so 6 is a perfect number. Python Program To Check Perfect Number Using For Loop Algorithm Steps: The user has to enter any number. The Armstrong numbers, for instance, are 0, 1, 153, 370, 371, and 407. Example 2: For Loop with List. pass the itrnumb as a argument to checkPerfectNumbr () function. If the sum of a number's appropriate divisors (excluding the number itself) equals the number, the number is said to be the perfect number. Python For Loops A for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string). Within the loop, if a proper divisor is found, we add it to the n_sum. Because Python Program to Generate Perfect Numbers in an Interval . In this case it's 6. Find the factors of the given number (n) by using a loop (for/ while). Simple (by taking user input) 3 Explaination 4 2. 1. By using functions, there are two methods available to find the sum of squares in python. A number is said to be a Perfect Number when that is equal to the sum of all its positive divisors except itself. And 1+2+3 is equal to 6. Check if the number is divisible by the counter. Quite simple just multiply n (n-1) (n-2) (n-3) (n-4 . Step by Step working of the above Program Code: For . When it is required to check if a number is a perfect number, a simple 'for' loop can be used. It means, for the first iteration number is 2, second iteration number = 4 (not 3) so on. If True, execute the body of the block under it. A number is said to be a perfect square number if it can be obtained by the multiplication of two equal integer numbers. Using For Loop. 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. i and j are the factors of the number if i*j==numb. Input: n = 6 Output: true Divisors of . Reminder = Temp % 10. We can also use while loops to find the factorial of a number in Python. In this program, the number whose factor is to be found is stored in num, which is passed to the print_factors () function. For example, 28 is a perfect number, because the divisors of 28 in this case are 1, 2, 4, 7, 14. Reminder = 145 % 10 = 5. A number is a perfect number if is equal to sum of its proper divisors, that is, sum of its positive divisors excluding the number itself. Therefore, we will use a loop to get the proper divisors of six and calculate their sum. 6 is a perfect number in Python because 6 is divisible by 1, 2, 3 and 6. For example, 2, 3, 5, 7, 11, 13 etc. Python print() Python len() Output. Calculate whether the number is Perfect number or not using the Python For Loop. for example, 16 is a perfect square number because it can be obtained by the multiplication of two equal integers (4*4=16). The sum of the cubes of an Armstrong number's digits. Take input from the user. Python Program to find Perfect Number using Function. 153 = 1*1*1 + 5*5*5 + 3*3*3. For example, we will take 6 as a number and its divisors are 1, 2, and 3 excluding itself so the sum of its divisors i.e., 1+2+3= 6. This value is assigned to the variable x in print_factors (). Finally, out of the for loop, check if the number = sum which we obtained as a result of the earlier loop and if it is equal, return perfect number else return not a perfect number. In java programming, there are three different ways to check the perfect number as follows. In algebra, a cube of a number is its third power: the result we get by multiplying that number with itself twice (Wikipedia, 2019).A so-called perfect cube is the result of multiplying a positive integer with itself two times (Kelley, 2007; Wikipedia, 2019).. For example, 8 is a perfect cube because 2 x 2 x 2 = 8. 2. Sum of these values are 1+2+3 = 6 . The first argument ( start) which as we saw earlier is optional, is where the sequence should begin (in this case it's 1). Example 3: For Loop with Tuple. Answer: Let's assume the file convention of the 100 files is file_number.txt. Perfect number in Python In Python, any number can be a perfect number if all of its positive divisors, excluding the number itself, add up to the same value. In the previous article, we have discussed Python Program to Add Two Numbers Without Using the "+" Operator. An example of a perfect number is the number 6, the first perfect number in the series. Python For Loop - break. range(10) will generate numbers from 0 to 9 (10 numbers). This loop will start from 1 and the final value of the loop control variable should be 3 which is half of the given number. A perfect number is a positive integer number in which sum of all positive divisors excluding the number itself is equal to that number. 6. This argument is inclusive and the number is included. Iterating over a sequence is called traversal. For instance, if we take 6, its divisors are 1, 2, and 3. The while loop iterates like first, it checks if the number is not equal to zero or not. So, the sum of its factors is '1 + 2 + 3 + 6 = 12', that is '12' and twice the number that is '6 * 2 = 12'. Compare the original value with the Sum value. Use a for loop to iterate over a sequence of numbers. Declare a variable (s) for storing sum. Therefore using the following statement: num = int(num) the value of num gets converted into an integer type value. We can generate a sequence of numbers using range() function. Factorial of a non-negative number is defined as multiplication of all natural numbers smaller than it upto 1. First, we need to read the number entered from the user. Sum of divisors is 9 which is not equal to 15. The numbers 1, 2, and 3 are its proper divisors, and the sum of all three proper divisors gives us the original number, which makes it a perfect number. Sum of divisors is 1 + 2 + 3 = 6. 1. One using a loop, another one without using the loop. number = 5; index = 0; while index <= number: print (index**2) index+=1 #PYTHON OUTPUT 0 1 4 9 16 25. Print the result. Live Demo Using this number it will calculate whether the number is Perfect number or not using the Python For Loop. Write a function to check if a given number is perfect or not. Some of the Java perfect numbers are 6, 28, 496, 8128, and 33550336, so on. Here, it calculates the factorial of 5 = 120. What is a Perfect Number? 2) change return to var = 3) change the while loop header to while not var: 4) add var = False before the while loop start to give it a default value Perfect Number In Python Using While Loop-DecodingDevOps A perfect number is a positive integer that is equal to the sum of its proper divisors. Inside the for loop take a variable to say ' itrnumb ' and initialize its value to the iterator value.
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