Label numbers as even or odd, or flag every other row.
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=IF(ISEVEN(A2), "Even", "Odd")ISEVEN returns TRUE for even numbers and ISODD for odd ones. Applied to the row number, they're a quick way to alternate-stripe or split data into two groups.
=IF(MOD(A2, 2)=0, "Even", "Odd")→OddMOD by 2 also tests parity.
Use conditional formatting with the rule =ISEVEN(ROW()).
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