for loop evil, but wanted

[Johnny Chan]

How do you write a for loop in kdb?

I know loops are considered evil by you vector guys but sometimes the code really just requires a loop. I tried a few “for” combinations but couldn’t create one in kdb.

[John Dempster]

the q language does not have a for loop. Other control statements are available. e.g.


q)i:0; while[i<3; show i; i:i+1]; show `end
0
1
2
`end
q)i
3

q)do[3; show i; i:i+1]; show `end
6
7
8
`end


if, else are also possible.

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