Need help with coding in java, a while loop and for loop?

Here's the question:

Write a program that asks the user to enter a positive, non-zero integer value. The program then sums up all the numbers between 0 and the integer entered. Use a while loop. Then use a for loop to write the same program.
Once you have completed the above, extend the program with input validation. The program should repeatedly ask for an integer greater than 0, until the user enters valid input. Here is an example run:
Please enter an integer greater than 0: -1
Invalid input. Please enter an integer greater than 0: -10
Invalid input. Please enter an integer greater than 0: 3
The sum of the numbers between 0 and 3 is 6.

Help please?? lol

 

Re: Need help with coding in java, a while loop and for loop

If only I knew java. It was once being pushed for the classes I took, but it never happened.

The best I could do is give you some pseudo code since I have programmed in some other languages.

 

Re: Need help with coding in java, a while loop and for loop

Hope its not too late:

User enters NUMBER

int sum =0 ;
for (int i=0; i<=NUMBER; i++)
{
sum= sum+(NUMBER-i);
}

Re: Need help with coding in java, a while loop and for loop

the while loop looks like:

User enters NUMBER

while(NUMBER >= 0)
{
sum = sum + NUMBER;
NUMBER--;
}

Re: Need help with coding in java, a while loop and for loop

by no means where the above optimized for speed, just a quick code to get what you need to get done. The above should be the main part of the code producing the results. - Hope that helps.