Help writing program that asks user for number and prints sum of all numbers between

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12-30-2010
celticpride

Help writing program that asks user for number and prints sum of all numbers between

Hello, I've been given a problem where I need to ask the user to input a number between 1 and 100. The program should then take that number and display the sum of all the numbers between the number the user entered and 1. The actual problem is below:

Quote:

Write a program that asks the user for a number between 1 and 100 from the user and will print the sum of all the numbers between 1 and that number. For example if the user enters 6 the output should be : The sum of numbers between 1 and 6 is 21.

However, I have no idea where to start coding this.

Any ideas? Thanks.
12-30-2010
tabstop

1. Ask the user for a number
2. Determine the sum of 1+2+3+...+user's number. (Hmmm, a repetitive computation; if only there was some way to repeatedly execute an instruction, or set of instructions, over and over again....)
3. Print the result statement.
12-30-2010
grumpy

Hmmm .... there was also a thread in the last few days with a very similar problem.

In this particular case, there is a simple formula that allows the result to be computed without a loop.
12-30-2010
celticpride

Quote:

Originally Posted by tabstop

1. Ask the user for a number
2. Determine the sum of 1+2+3+...+user's number. (Hmmm, a repetitive computation; if only there was some way to repeatedly execute an instruction, or set of instructions, over and over again....)
3. Print the result statement.

I can do the first and third easily, just not the 2nd step.
12-30-2010
celticpride

Quote:

Originally Posted by grumpy

Hmmm .... there was also a thread in the last few days with a very similar problem.

In this particular case, there is a simple formula that allows the result to be computed without a loop.

Could you put me in the right direction?
12-30-2010
tabstop

Do you not see the thread in this very forum about "adding numbers from 1 to 1,000,000"?
12-30-2010
celticpride

Quote:

Originally Posted by tabstop

Do you not see the thread in this very forum about "adding numbers from 1 to 1,000,000"?

And how does that help me? Instead of pointing me to other threads, can you please help me with the actual code?
12-30-2010
tabstop

Quote:

Originally Posted by celticpride

And how does that help me? Instead of pointing me to other threads, can you please help me with the actual code?

That thread provides a (worked-out!) example of the type of thing that you are (supposed to be) doing. Therefore, we point you to that thread, so that you can read it and see an example of what it is you need to be doing. I realize that not lovingly hand-crafting code for you to use does not make you feel like a special and unique snowflake. But them's the breaks.
12-30-2010
CommonTater

Quote:

Originally Posted by celticpride

And how does that help me? Instead of pointing me to other threads, can you please help me with the actual code?

Ummm no... it's you that has to write the code.

Check this board's homework policy.