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Thread: Desperte for your help

  1. #1
    Junior Member james's Avatar
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    Red face Desperte for your help

    Hey guys i have anther program here that really needs your help.
    Heres the question:
    Do the following programs:
    a) Write a program to display the sum of first 10 even numbers [2]
    b) Write a program that displays the total number of multiples of 7 between the
    numbers 1 and 100 [2]
    c) Write a program to add seven terms of the following series. 1! + 2! + 3! ................
    [3]

    public class quetion3a
    {
     public static void main(String[] args)
      {
       int num, sum;
       sum= 0;
       for (num=2; num<21; num=num+2)
            {
             sum=sum+num;
            }
       System.out.println("The sum of the first ten even numbers is "+sum);
      }
    }
    />
    Last edited by helloworld922; June 4th, 2010 at 07:10 PM. Reason: please use [code] tags

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    Member Darryl.Burke's Avatar
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    Default Re: Desperte for your help

    Hey, whaddya think this is, a homework service?

    Here's a good tutorial that will help you (link below)
    The Java™ Tutorials

    db

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    Default Re: Desperte for your help

    We can help you write the code, but we won't write it for you. Post the code you have so far and explain what you are stuck on.

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    Default Re: Desperte for your help

    For second part, perhaps

    int num1 = 1;
    int num2 = 1;
     
    while (num2 >=1 && num2 <= 100)
    {
    num2 = num1 % 7;
     
    if (num2 == 0)
    {
    isMultiple = true;
    System.out.println(num1);
    num2 = 1;
    num1 = num1 + 1;
     
    }
     
    else 
    {
    isMultiple = false;
    num1 = num1+ 1
    }
     
    }
    Last edited by helloworld922; June 4th, 2010 at 07:11 PM. Reason: please use [code] tags

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    Default Re: Desperte for your help

    For the third part,

    try something like

    int arrayOfStoredFactorials[] = new int [7];
     
    int list[] = new int[7];
     
    for (int a = 0;  a < 7; a++)
    {
    list[a] = a+1;
    }
     
    for (int i= 0;  i < 7 ; i++)
    {
    arrayOfStoredFactorials[i] = list[i];
     
     
    if (i > 0)
    {
    arrayOfFactorials[i] = list[i] * list[i-1];
    }
     
    }
     
    int sum = 0;
     
    for (int index = 0; index < arrayOfFactorials.length; index++)
    {
    sum = sum + arrayOfFactorials[index[;
    }
     
    System.out.println(sum);