XL interprets any non-zero numeric value as TRUE and zero as FALSE, so,
literally:

=IF(AND(A1<0,B1<0),A1+B1,"Something else")

OTOH, XL coerces TRUE to 1 in math formulae and FALSE to 0, so "if A1 is
true then B1 is also true" translates to

B1: =IF(A1=TRUE, TRUE, "Something Else")

and

result = IF(A1=TRUE, A1+B1,"Something Else Again")

which will always return 2 (TRUE+TRUE=== 1+1).


In article ,
Puffin1 wrote:

How do I write the formula for "If A1 is true, then B1 is also true and the
result = A1+B1