Loops/For with a specified step: Difference between revisions
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2 4 6 8 who do we appreciate?</syntaxhighlight>
Note that an expression of the form <code>(start, step) (p. i.) count</code> will generate the specified numbers (<code>p.</code> is J's polynomial primitive, <code>i.</code> is J's index generator). So, to generate the above sequence of integers we could have used:
<syntaxhighlight lang=J> 0 2 (p. i.) 5
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