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Excel functions.
IF(condition, value_if_true, value_if_false)IFERROR(expression, value_if_error)ISNUMBER(value)ISBLANK(value)ISNA(value)ISERROR(value)AND(logical1, logical2, ...)OR(logical1, logical2, ...)NOT(logical)IF(condition, value_if_true, value_if_false)IF(condition, value_if_true, value_if_false)