Hi, Yes, there is. See the manual on logical operations in "Formula syntax for Calc", which gives an example for almost exactly the same thing.
| 1 | 2 | 13 | | | | | #+TBLFM: $3=if("$1" == "nan" || "$2" == "nan", string(""), $1+$2+10);E Yours, Christian Loris Bennett writes: > Hi, > > If I have > > | 1 | 2 | 13 | > | | | 10 | > #+TBLFM: $3=$1+$2+10 > > is there a way to suppress calculation of column 3 if, as in row 2, the > entry in column 1 is empty? > > Cheers, > > Loris