K

Outer loop index. When “do” loops are nested, this pushes the value of the third-innermost loop onto the stack. Do not use outside of triply-nested loops.

Note that before the inner loops begin, after they end, or between inner loops, this value may need to be referred to with J or even I.

do(2 1)
    do(4 3)
        do(6 5)
            I J K Trace3
        loop
    loop
loop

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