For Looping

AsteriskTriangle

import java.io.*;
import java.util.Scanner;
 
public class AsteriskTriangle {
	public static void main (String [] args) {
 
		Scanner input = new Scanner(System.in);
 
		System.out.println("Type an integer: ");
		int nmbr = input.nextInt();

		System.out.println("Here is your tree!");
 
		for (int i = 1; i <= nmbr; i++)
		{
			for (int h = 0; h < i; h++)
			{
				System.out.print("*");
			}
		}
	}
}

ClassifyNumbers

import java.util.Scanner;
 
public class ClassifyNumbers {
	public static void main(String [] args) {
 
	int nmbrs, number, lowLimit, highLimit, count;
	int sum = 0;
	int total = 0;
	Scanner input = new Scanner(System.in);
 
	System.out.println("How many numbers:");
	nmbrs = input.nextInt();
 
	System.out.println("Low Limit:");
	lowLimit = input.nextInt();
 
	System.out.println("High Limit:");
	highlimit = input.nextInt();
 
	for (count = 1; count <= nmbrs; count++)
	{
		System.out.println("Type first number");
		number = input.nextInt();
 
		if (number >= lowlimit && number <= highlimit)
		{
			System.out.println("The number is within range");
			sum = sum + numero;
			total = total + 1;
		}
		else
			System.out.println("Number is out of range");
	}
 
	System.out.println(+ total + "numbers within range");
	System.out.println("The sum is" + sum ".");
 
	}
}

PerfectNumber

import java.util.Scanner;
 
public class PerfectNumber {
	public static void main(String [] args) {
 
	Scanner input = new Scanner(System.in);
	
	System.out.println("How many numbers:")
	int amount = input.nextInt();

	for (int i = 1; i <= amount; i ++) {

		System.out.println("Type number #" + i);
		int number = input.nextln();
		int result = 0;

			for (int h = 1; h < number; h ++)
			{
				if (number % h == 0){
					result = result + h;
				}
			}
			if (result == number) System.out.println("The number is perfect.");
			else System.out.println("The number is not perfect.");
		}
	}