## Explanation

The core of this formula is COUNTIF, which is configured to count three separate values using wildcards:

```
COUNTIF(B5,{"x*","y*","z*"})
```

The asterisk (*) is a wildcard for one or more characters, so it is used to create a "begins with" test.

The values in the criteria are supplied in an "array constant", a hard-coded list of items with curly braces on either side.

When COUNTIF receives the criteria in an array constant, it will return multiple values, one per item in the list. Because we are only giving COUNTIF a one-cell range, it will only return two possible values for each criteria: 1 or 0.

In cell C5, COUNTIF evaluates to {0,0,0}. In cell C9, COUNTIF evaluates to: {0,1,0}. In each case, the first item is the result of criteria "x*", the second is from criteria "y*", and the third result is from criteria "z*".

Because we are testing for 3 criteria with OR logic, we only care if *any* result is not zero. To check this, we add up all items using the SUM function, and, to force a TRUE/FALSE result, we add ">0" to evaluate the result of SUM. In cell C5, we have:

```
=SUM({0,0,0})>0
```

Which evaluates to FALSE.

### More criteria

The example shows 3 criteria (begins with x, y, or z) , but you add more criteria as needed.

### Conditional formatting

Since this formula returns TRUE / FALSE, you can use it as-is to highlight values using conditional formatting.