Excel中IF公式异常求助：请排查=IF(H88>=H87, "up", "dn")错误

Hey Danny, let's figure out why your =IF(H88>=H87, "up", "dn") formula isn't behaving as expected. I’ve dealt with plenty of these seemingly simple comparison bugs in Excel before, so here are the most likely fixes to check:

• Hidden spaces or non-printable characters in H87/H88
  Sometimes cells look like plain numbers but have invisible spaces or special characters, making Excel treat them as text instead of numerical values. To test this:

  • Use =LEN(H87) and =LEN(H88) to check if the character count matches what you’d expect for your numbers.
  • Try cleaning the values with TRIM and forcing numerical conversion: modify your formula to =IF(TRIM(H88)+0>=TRIM(H87)+0, "up", "dn") (the +0 tricks Excel into treating text-like numbers as actual values).

• Cells formatted as text instead of numbers
  If H87 or H88 is set to text format, Excel compares values lexicographically (e.g., "100" will register as less than "90" because "1" has a lower ASCII value than "9"). Fix this by:

  • Selecting H87 and H88, right-clicking, choosing Format Cells, switching to the Number tab, and picking General or Number.
  • Double-clicking each cell and pressing Enter to confirm the format change.

• Floating point precision discrepancies
  If H87/H88 are results of calculations with decimals, Excel’s floating-point math can create tiny invisible differences (like 1.0000000001 vs. 1). To fix this, round both values to a consistent precision:

  • Adjust your formula to =IF(ROUND(H88,5)>=ROUND(H87,5), "up", "dn") (replace 5 with the number of decimal places you need).

• Circular references or volatile function interference
  Check if H87 or H88 references the cell containing your IF formula—this creates a circular reference that can skew results. Also, if those cells use volatile functions like NOW() or RAND(), their values might fluctuate unexpectedly, causing inconsistent outputs.

• Accidental cell reference typos
  Double-check that you didn’t mistype the cell references (e.g., H78 instead of H87). It’s easy to slip up with similar row numbers!

Give these steps a shot—one of them should resolve the issue. If not, we can dig into more edge cases together!

内容的提问来源于stack exchange，提问作者Danny Lee Piloote