Möbius function: Difference between revisions

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m →‎{{header|REXX}}: added zkl header
m →‎{{header|REXX}}: added a comment about the mu number.
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if x//p==0 then return 0 /*X÷by P? Then return zero.*/
end
end /*k*/ /*# (below) is almost always small, <9*/
return -1 ** # /*raise negative unity to the mu power.*/
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