print in console application by using forloop

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1.00/5 (1 vote)

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C#3.5

1 212
32123
4321234
print this in console window

Posted 25-Oct-14 20:35pm

sashkhdr

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OriginalGriff · Accepted Answer · 2014-10-25T20:58:00

Solution 1

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.

Try it yourself, you may find it is not as difficult as you think!
If you get stuck on a particular bit, then ask about that - but this is your task, and we will not do it for you!

I did It....By Using Five If Conditions......

:laugh:
Look at each if condition. If "i" is "n" then you start "k" from "n"...so why check the "i" value, instead just start the "k" loop from "i"?

Time to put you out of your misery, you are close enough!
Here is my version:

C#

for (int i = 1; i <= 5; i++)
    {
    for (int k = i; k > 1; k--)
        {
        Console.Write(k + " ");
        }
    for (int j = 1; j <= i; j++)
        {
        Console.Write(j + " ");
        }
    Console.WriteLine();
    }

Do you see what I mean now? Does that make sense?

Posted 25-Oct-14 20:58pm

OriginalGriff

Updated 25-Oct-14 23:52pm

v2

Comments

sashkhdr 26-Oct-14 3:19am

for(int i=1;i<=5;i++)
{
for(j=1;j<=i;j++)
{
console.write(j+" ");
}
Console.Writeline();
}
.....................
After that im not getting plz help

OriginalGriff 26-Oct-14 3:30am

The first thing to notice is that C# is *case sensitive* - so "console" is not the same as "Console", and "Writeline" is not the same as "WriteLine". And unless you already have a variable called "j", you need to specify the type of that as well. Correct those and you code should at least compile.

After that, how does your output differ from the homework question?
That should give you a big hint as to where you need to start - going down, not up! Try that, and tell me what happens with your new code.

sashkhdr 26-Oct-14 3:44am

I tried by using jagged array....

static void Main(string[] args)
{
int[][] arr = new int[4][] ;
arr[0] = new int[] { 1 };
arr[1] = new int[] {2, 1, 2 };
arr[2] = new int[] {3,2, 1, 2, 3 };
arr[3] = new int[] {4,3,2, 1, 2, 3,4};
for (int i = 0; i < arr.Length; i++)
{
int[] num = arr[i];
for (int j = 0; j < num.Length; j++)
{
Console.Write(num[j]+" ");
}
Console.WriteLine();
}

is it correct..i cont solve by using for loop by taking num in loop

OriginalGriff 26-Oct-14 3:56am

Stop and think: how would you do it by hand?
You would have an outer loop to control the number of lines: you have that.
But inside that loop, what would you do?
What number would you start by printing on a line? What number is next?

These aren't trick questions - you could do it very easily with a pen and paper, so it's a case of "working out" how you do that, and translating it into code.

I'll help you, but it really is important that you make this "jump" by yourself - it's fundamental to developing!

sashkhdr 26-Oct-14 4:05am

static void Main(string[] args)
{
for (int i = 1; i <= 5; i++)
{
for (int j = 1; j <= i; j++)
{
Console.Write(j+" ");
}
Console.WriteLine();
}

....................................

after this What i have to do...plz help..or give some clue

OriginalGriff 26-Oct-14 4:19am

That doesn't print what you want:
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
You don't want to start printing at "1", do you? If you look at just teh last line, what you print is this:

1 2 3 4 5

And what you want is this:

5 4 3 2 1 2 3 4 5

So what value do you want to start with? (Hint, hint!) :laugh:

sashkhdr 26-Oct-14 8:51am

in this program i have one error
near -res-local variable in else statement
string res;
for (int i = 1; i <= 4; i++)
{

if (i == 1) res = "1";
else

res = "" + i + res + i;
Console.WriteLine(res);

OriginalGriff 26-Oct-14 9:35am

That's because the compiler can see a possibility that res could be used before it is assigned - it can't actually happen, because the loop starts with i==1, but the compiler gets picky about these things sometimes! :laugh:
Change this:
string res;
to this:
string res = "";
And the problem will go away.

If that is the whole of your code, you can improve it by getting rid of the if condition:

string res = "1";
for (int i = 1; i <= 5; i++)
{
Console.WriteLine(res);
res = "" + i + res + i;
}

But you shouldn't really be using syntax like this:
res = "" + i + res + i;

Have you learned about string.format or the StringBuilder class yet?

sashkhdr 26-Oct-14 4:41am

how to start with 543212345....
i want to take -5....i didnt getting the answer please give answer fot this please sir

OriginalGriff 26-Oct-14 4:44am

Yes! You want to start with 5...so what value have you got that is 5 for the last line, 4 for the one above, and so on? You are so close...

sashkhdr 26-Oct-14 5:08am

This Code Is Littlebit Working..But Not Same As that

static void Main(string[] args)
{
for (int i = 1; i <= 5; i++)
{
for (int k = 4; k > 1; k--)
{
Console.Write(k + " ");
}
for (int j = 1; j <= i; j++)
{
Console.Write(j+" ");
}
Console.WriteLine();
}

}

sashkhdr 26-Oct-14 4:59am

sorry....i didn't get the Answer... i did like this But It Came Wrong
.........................
static void Main(string[] args)
{
for (int i = 1; i <= 5; i++)
{
for (int j = 1; j <= i; j++)
{
Console.Write(j+" ");

}

for (int k = 5; k > 1; k--)
{
Console.Write(k+" ");
}
Console.WriteLine();
}

}
}

OriginalGriff 26-Oct-14 5:15am

Forget the "k", you don't need it.
look at your older code:
static void Main(string[] args)
{
for (int i = 1; i <= 5; i++)
{
for (int j = 1; j <= i; j++)
{
Console.Write(j+" ");
}
Console.WriteLine();
}
And change it to this:
static void Main(string[] args)
{
for (int i = 1; i <= 5; i++)
{
Console.Write(i + " : ");
for (int j = 1; j <= i; j++)
{
Console.Write(j+" ");
}
Console.WriteLine();
}

Any ideas spring to mind?

Sorry to sound obtuse, but this is one of those "lightbulb" moments: if I tell you then you don't get the "Bing! I got it!" bit, which is important.

sashkhdr 26-Oct-14 5:20am

okay...

OriginalGriff 26-Oct-14 5:26am

And? Any ideas?

sashkhdr 26-Oct-14 5:28am

static void Main(string[] args)
{
for (int i = 1; i <= 5; i++)
{
for (int k = 5; k > 1; k--)
{

Console.Write(k + " ");
}
for (int j = 1; j <= i; j++)
{
Console.Write(j+" ");
}
Console.WriteLine();
}

sashkhdr 26-Oct-14 5:37am

I did It....By Using Five If Conditions......

static void Main(string[] args)
{
for (int i = 1; i <= 5; i++)
{
if(i==1)
{
Console.WriteLine(" ");
}
if(i==2)
for (int k = 2; k > 1; k--)
{

Console.Write(k + " ");
}
if (i == 3)
for (int k = 3; k > 1; k--)
{

Console.Write(k + " ");
}
if(i==4)
for (int k = 4; k > 1; k--)
{

Console.Write(k + " ");
}
if (i == 5)
for (int k = 5; k > 1; k--)
{

Console.Write(k + " ");
}

for (int j = 1; j <= i; j++)
{
Console.Write(j+" ");
}
Console.WriteLine();
}

}

how to avoid Five if Conditions..

OriginalGriff 26-Oct-14 5:52am

Answer updated.

sashkhdr 26-Oct-14 5:59am

I Got The Answer Finally..... The Code Is
static void Main(string[] args)
{
for (int i = 1; i <= 5; i++)
{
for (int j = i; j > 1; j--)
{
Console.Write(j+" ");
}
for (int k = 1; k <= i; k++)
{
Console.Write(k+" ");
}
Console.WriteLine();
}
}

i got it

OriginalGriff 26-Oct-14 6:13am

Well done!
It's a good feeling when you work it out yourself, isn't it?

sashkhdr 26-Oct-14 6:25am

yes..its great...and also thank you for your Help

OriginalGriff 26-Oct-14 6:40am

You're welcome!

sashkhdr 26-Oct-14 6:07am

I want to be your friend

sashkhdr · Accepted Answer · 2014-10-26T00:00:00

C#

static void Main(string[] args)
       {
           for (int i = 1; i <= 5; i++)
           {
               for (int j = i; j > 1; j--)
               {
                   Console.Write(j+" ");
               }
               for (int k = 1; k <= i; k++)
               {
                   Console.Write(k+" ");
               }
               Console.WriteLine();
           }
       }