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%% Test for ISNUMBER function. %mode init A1:345 A2=2 A3=CONCATENATE("string", " ", "formula") A4@string cell B1=ISNUMBER(A1) B2=ISNUMBER(A2) B3=ISNUMBER(A3) B4=ISNUMBER(A4) B5=ISNUMBER(A5) %calc %mode result B1=true B2=true B3=false B4=false B5=false %check %exit