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Introducing Formulas and Functions 11<br />

FIGURE 11.17<br />

You can use a range-intersection formula to determine values.<br />

The formula in cell B9 is<br />

=B1:B6 A3:D3<br />

This formula returns 10, the value in cell B3 — that is, the value at the intersection of the two ranges.<br />

The intersection operator is one of three reference operators used with ranges. Table 11.4 lists these operators.<br />

TABLE 11.4<br />

Operator<br />

What It Does<br />

Reference Operators for Ranges<br />

: (colon) Specifies a range.<br />

, (comma) Specifies the union of two ranges. This operator combines multiple range references into a single<br />

reference.<br />

(space)<br />

Specifies the intersection of two ranges. This operator produces cells that are common to two<br />

ranges.<br />

The real value of knowing about range intersections is apparent when you use names. Examine Figure<br />

11.18, which shows a table of values. I selected the entire table and then used Formulas ➪ Defined<br />

Names ➪ Create From Selection to create names automatically by using the top row and left column.<br />

201

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