Loops in Java (Exercise 3)

Java Programming: Programming Question on Loops in Java Programming
Topics Discussed:
1. Writing a program that displays the sum of the strict divisors of an integer given by the user.

Music:
Axol x Alex Skrindo - You [NCS Release]

#JavaByNeso #JavaProgramming #Loops

[abdishakur]

I like your videos neso academy, keep going as am learning Java from your tutorials. Thanks a lot 😍

[NZIT]

Hi Neso ! I have a suggestion for this part of exercise when finding the strict divisor and the sum of divisors. First of all when you used n/2 on the for loop you made it too complicated I think, here my suggestion:
1: we prompt the user to enter the number....[code]= (System.out.println("Enter your number")); ---- 2: We get the number from the user ....[ code]= ( int number= input.nextInt();):---- 3: we declare the variable both sum and the divisor . [code ]= ( int sum=0; and int divisor =1);---- 4: we write our for loop. ( ; divisor<=number; divisor++); ---- 5: inside the loop. we write our if condition [code ]= if(number % divisor==0){ System.out.print(divisor + " "); and sum+= divisor; ---6 : Outside of our for loop we can print the sum of the stric divisor [code ]= System.out.println(sum). Notice that if we want to display all the divisors number we have to change divisor< number instead of divisor<= number in our for loop. Thanks I think it can help someone here to understand more better.

[chiyasarbarz]

Thanks for your best educate you are awesome Ali💥

[HOPE_-lomz]

for(int i=1;i<num;i++)
{
if(num%i==0)
sum+=i;
}

[IMRANsLU]

import java.util.Scanner;

class Divisor
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int x =s.nextInt(), sum = 0;
//To continue the loop
for(int i=1;i<x;i++){
//To calculate the divisor
if((x%i== 0)){
System.out.print(i);
sum +=i;
//To avoid the + sign after last digit
if(i<x/2){
System.out.print(" + ");
}
}
}
System.out.print(" = "+ sum);
}
}

[rayaraya]

Scanner in = new Scanner(System.in);
System.out.println("type a number :");
int num = in.nextInt();

int i;
int sum = 0;
for(i = 1; i<=num/2 ; i++){
if(num % i == 0){
System.out.print(i + " ");
sum = sum + i;
}
}
System.out.println();
System.out.println("sum = " + sum);

[advitiayanand]

Great content mate. Just to put it out there, 1 is not a strict divisor since it divides every number :)

Just read this on Wikipedia :P

[tabassumpriasha]

u could just change the ending condition inside for loop with n instead of n/2 to get all divisors instead of strict

[thivagarmurugan]

public static void main(String args[]) {

Scanner num=new Scanner (System.in);
int sum=0;
int n=num.nextInt();
for (int i=1;i<=n/2;i++)
{
if (n%i==0)
{
sum+=i;

}

}
System.out.println(sum);

}
}

[tarunwadhwani]

import java.util.Scanner;

public class Main {
public static void main(String[] args) {




Scanner input = new Scanner(System.in);
: ");
int i = input.nextInt();
int n = i / 2;
int sum = 0;

while (n >= 1) {

if (i % n == 0){
System.out.print(n + ", ");
sum += n;
}
n--;

}
System.out.println("sum is equals to " + (sum + i));

}

}

[suryamj]

How does the last case work for n = 2.

[n.hemanthkumar]

Please try uploading 2-3 videos per day .
As everyone are free at home

[vishalchoubey]

what if we take a number which is a square of some number like 4= 1+2+2, to include this condition in this program?

[sairamnomula]

I'm using VScode, I'm getting the error "i cannot be resolved", and if I declare it outside the loop, it's not showing any error but I'm getting the result wrong.
Any idea, how to fix it?

[yevgeni]

How to make Intellij print in the same row like your 1 2 4 5 10 in 4:20??

[aaageneral]

System.out.print("Enter a number: ");
int n = s.nextInt();

int sum = 0;
for(int i = 1; i <= n; i++)
if(n % i == 0)
//sum += i;
System.out.print(i + " ");
//System.out.println(sum);

}
} // I tried this method before you tell and also got the result😅

[bhaigaming-gm]

bro a strict divisor cant be equal to 1 so u should start the iteration from 2 not 1

[jejewite]

Your solution doesnt work for negative integers. Shouldve mentioned positive integers at the first place, or add Math.abs()

[la]

Scanner scanner5 = new Scanner(System.in);
System.out.print("Divisor Calculator, Pick an integer to determin it's strict divisors: ");
int num = scanner5.nextInt();
int numbers = 0;
for(int i = 1; i <= num; i++){
if(num % i == 0 && i <= num/2){
numbers += i;
if(i>1){
System.out.print(" + " + i);
}
else{
System.out.print(i);
}
}

}
System.out.println(" = " + numbers);

[suswithcherry]

import java.util.Scanner;

class Check {
public static void main(String[] args) {

System.out.print("enter an integer: ");
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();

// For Loop
int sum1 = 0;
for(int i = 1; i <= n/2; i++) {
if(n % i == 0) {
sum1 += i;
System.out.print(i + " + ");
}
}

System.out.println("0 = " + sum1);

// While Loop
int sum2 = 0;
int i = 1;
while(i <= n/2) {
if(n % i == 0) {
sum2 += i;
System.out.print(i + " + ");
}

i++;
}

System.out.println("0 = " + sum2);

// Do-While Loop
int sum3 = 0;
int j = 1;
do {
if(n % j == 0) {
sum3 += j;
System.out.print(j + " + ");
}

j++;
} while(j <= n/2);

System.out.println("0 = " + sum3);
}
}