How to increment i in for loop in C#

Question

I'm trying to modify the code below so each first number in column is based on the row number.

int i, sum = 0;

for (int row = 0; row < 7;  row++)
{
    for (i = 1; i < 6; i++)
    {
        sum = sum + i;
        Console.Write("{0} ", i);
    }

    Console.WriteLine(sum);
    sum = 0;                
}

Console.Read();

presents this in console:

1 2 3 4 5 15
1 2 3 4 5 15
1 2 3 4 5 15
1 2 3 4 5 15
1 2 3 4 5 15
1 2 3 4 5 15
1 2 3 4 5 15

But I'm trying get like this:

1 2 3 4 5 sum
2 3 4 5 6 sum
3 4 5 6 7 sum
4 5 6 7 8 sum
and so on..
......
....

Any idea on how to solve this?

Hint: you're starting each row, in your inner loop, with i = 1. Maybe that's something you can change? — David Makogon
– David Makogon, Commented Apr 5, 2018 at 19:31

littlerufe · Accepted Answer · 2018-04-05 20:12:41Z

7

Change the inner loop to be

for (int i = row + 1; i < row + 6; i++)

edited Apr 5, 2018 at 20:12

littlerufe

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answered Apr 5, 2018 at 19:31

RBreuer

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Comments

Edwin Bentveld · Accepted Answer · 2018-04-05 19:38:46Z

1

Replace

sum = sum + i;
Console.Write("{0} ", i);

enter code here

with

number = number + row
sum = sum + number;
Console.Write("{0} ", number);

This way you use the variable row to keep track of the starting number for the row.

answered Apr 5, 2018 at 19:38

Edwin Bentveld

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Comments

Ctznkane525 · Accepted Answer · 2018-04-05 19:44:51Z

0

If you don't need the console statements and just the sum, you can just use no inner loop and:

sum = Enumerable.Sum(Enumerable.Range(row+1, 5));

It's LINQ

or, if you need the console statement:

Enumerable.Range(row+1, 5).ToList().ForEach(c => sum += c; Console.Write(c));

answered Apr 5, 2018 at 19:44

Ctznkane525

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4 Comments

David Makogon Over a year ago

Suggesting LINQ and lambdas to a brand new programmer? They're still trying to grok for-loops.

Ctznkane525 Over a year ago

i think the point should be considered that most of us began programming in an environment where those concepts didnt exist...there might be a time where someone considers these concepts synonymous instead of a step up @DavidMakogon

David Makogon Over a year ago

Point being, they had the start point of the loop incorrect. Your solution was a complete departure from their code, dove into enumerables, linq, lambda. This in no way corrects their code. It's a rewrite. Might be an obvious solution for a seasoned developer. But the answer is not in line with their question and level of competence in c#. It's great that you can provide such a succinct answer; just that it's out of context for this question.

Ctznkane525 Over a year ago

An old school mentality like that will definitely mean you select an rb at 2...go iggles

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