Write number to cell if same number exist in diffrent cell


How to create in cell formula to show in that cell number 1 when formula is correct. Formula will be to check if the number match number from diffrent cell.

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=IF(D1; A1;"") (OR depending on language: =IF(D1, A1,"") ) This will check if the cell D1 contains a TRUE value and will return A1 otherwise will return an empty string. D1 contain the formula that will check and return TRUE or FALSE.

Going further =IF(ISERROR(D1); A1;"") (or any other checking function as: ISNA, ISERR …)