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Nairaland Forum / Science/Technology / Programming / Trivial Quiz? (1229 Views)
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Trivial Quiz? by bakenda(m): 11:29am On Nov 16, 2011 |
I was preparing a lesson example, and found it's not as straightforward as i thought - write a simple loop that outputs all the odd numbers less than 50. --use only while loop --do not use the modulus(%) operator Just want to see the different approaches of fellow programmers. |
Re: Trivial Quiz? by Fayimora(m): 1:25pm On Nov 16, 2011 |
With Java class Bakenda { public static void main(String[] param) { int x=1; while(x<50){ System.out.println( x ); x+=2; } } } or with Ruby
Remove the space between the dots. . |
Re: Trivial Quiz? by bakenda(m): 1:59pm On Nov 16, 2011 |
Gooood. I should av added a 3rd condition - use only a 1-step increment. |
Re: Trivial Quiz? by Fayimora(m): 3:28pm On Nov 16, 2011 |
I Dont understand that condition, Does that apply to me??, Do you mean it has to be +1 always? |
Re: Trivial Quiz? by bakenda(m): 10:19pm On Nov 16, 2011 |
Fayimora: Yeah. You may want to try it out with +1 |
Re: Trivial Quiz? by Nobody: 10:53pm On Nov 16, 2011 |
# Python i = 0 while i < 25: print(2 * i + 1) i += 1 |
Re: Trivial Quiz? by ektbear: 7:13am On Nov 17, 2011 |
You can do it in closed form, I think. So no reason to do any looping. sum of the even numbers from 0 to 50 is equal to 2 times the sum of the numbers from 0 to 25. And there is a closed form expression for the latter (don't recall it off the top of my head, but it is on wikipedia.) |
Re: Trivial Quiz? by Nobody: 7:22am On Nov 17, 2011 |
Re: Trivial Quiz? by ektbear: 7:55am On Nov 17, 2011 |
Oh wow. I skimmed the post and misread it, thought he wanted a sum too. My bad. . |
Re: Trivial Quiz? by ektbear: 8:08am On Nov 17, 2011 |
Wow, pretty bad fail on my part. Whoops :x |
Re: Trivial Quiz? by Fayimora(m): 4:38am On Nov 18, 2011 |
bakenda:Guess thers no point again, ma solution is more or less the same with @omo's python solution |
Re: Trivial Quiz? by bakenda(m): 12:14pm On Nov 18, 2011 |
^^^ Yeah. My solution is similar too, but I didn't arrive at it "instantly" like that. I was working on an example on how to use the while loop(to output odd numbers), I thought it was a simple thing(it is, actually), my initial mistake was to write something like: while($n<50) { echo (2*$n)+1 . " "; $n++; } |
Re: Trivial Quiz? by Chimanet(m): 4:45pm On Nov 18, 2011 |
Now i c why computer science is tied to mathematics @ omo to dun u too much |
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