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need help about combinations

kaisen adina

Joined: Sep 22, 2012
Posts: 2
im making a program that will show the number of possible combination of
what the user inputs and number of takes at a time...
i already finished making showing the number of possible combination but
i am having problem in showing the actual items of combination of the inputted...
to make it more easy to understand...

for example

the user input " apple banana cherry mango orange"
number of takes at a time: " 3 "

the output will show the formula and computation and the total number of combinations:
for example the answer is " 10 "

now here comes the problem.

i need to show the possible combinations of the items if the total combinations is less or equal to 10

apple banana cherry mango orange by taking 3 at a time


apple banana cherry
apple banana mango
apple banana orange
apple cherry mango
apple cherry orange
apple mango orange
banana cherry mango
banana cherry orange
banana mango orange
cherry mango orange

thank you in advance guys
Winston Gutkowski

Joined: Mar 17, 2011
Posts: 8837



First: I broke up those two enormous lines of yours. For starters, they screw up the window formatting here; and secondly they're a very bad coding habit. Please re-read the UseCodeTags (←click) page thoroughly.

Second: Please KeepItDown (←click). Using all caps (as above) is regarded as SHOUTING!!! and it's not pleasant to read.

Third: As to your actual problem, there are several ways to tackle it; just one of which is to use recursion, viz:
"3 from 10" == 1 + all combinations of "2 from the remaining 9", which in turn == 1 + "1 from the remaining 8".


Bats fly at night, 'cause they aren't we. And if we tried, we'd hit a tree -- Ogden Nash (or should've been).
Articles by Winston can be found here
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 45277
Are you supposed to calculate how many combinations there are, or print them all out?
kaisen adina

Joined: Sep 22, 2012
Posts: 2
Campbell Ritchie wrote:Are you supposed to calculate how many combinations there are, or print them all out?

i'm finished at calculating the combinations there are

but the problem sir is that

when the total combinations entered by the user is <=10

it will print all the 10 combinations of the items or objects entered by the user...

the hard part is that is the "number of takes at a time"

for example if the user input 2 as a number of takes at a time it should print only 2 colums
if the user input 3 as a number of takes it should look like as the example above...
and so on...

I agree. Here's the link:
subject: need help about combinations
jQuery in Action, 3rd edition