Thread: nested loops

I don't know much about programming but I was trying to teach myself some from my sisters notes and there is an assignment where you use nested loops to get this

1
24
135
2468
13579
24681012

i can not seem to figure it out i have completed similar ones like

2
24
246
2468

and

13579
1357
135
13
1

can someone help me with it please?

Originally Posted by flysurfer

i have completed similar ones like

2
24
246
2468

and

13579
1357
135
13
1

Good start, lets refine your code whatever you have already tried a little bit. Try changing the patter from

2
24
246
2468

to

24
2468
24681012

and then try the same for creating the pattern

1
135
13579

And then try to combine those two logic, you will get your required pattern.

Yep, you should be able to build on what you did before. I guess that
2
24
246
2468

looked something like:

Code:

   int i, j;
   for (i = 1; i <= 4; i++)
   {
      printf("\n");
      for (j = 2; j <= i*2; j+=2)
      {
         printf("%d", j);
      }
   }

The other one is just the same, with the added fun of having to alternate between 1 and 2 for starting numbers. That can be done by using the modulo operator when initialising the inner loop counter.

There are probably a bunch of ways of doing this - you could for instance have 2 inner for loops and switch between them depending on which row you're on. You can get it all done with 2 for loops, but it is a bit fiddly to read. I think trying to combine your previous 2 exercises is a good idea.

Code:

main()
int a,b,i,j;
for(a=1,i=4;i<=12;i=i+4,a=a+4)
{
for(b=1;b<=a;b=b+2)
{
printf("%d",b);
}
printf("\n");
for(j=2;j<=i;j=j+2)
{
printf("%d",j);
}
printf("\n");
}
getch();
}

hey thanks for the help i will try it was thinking of using something like a if else for it but wasn't to sure about it