The EXACT function works as a lookup tool. However, it is case-sensitive. This function compares two text strings and returns TRUE if they are exactly the same, FALSE otherwise. In this post, EXACT will be used with SUMPRODUCT function to illustrate how EXACT function works.

**Exact match lookup with SUMPRODUCT**

**Generic Formula**

`=`

**SUMPRODUCT(--(EXACT( value , lookup_array)), amount_array)**

*Although SUMPRODUCT works with arrays, it **does not** require using array shortcut (CTRL + SHIFT + ENTER). You can complete a SUMPRODUCT formula by simply pressing ENTER after typing the formula.*

`Example`

`Example`

Considering the example below, the formula in D5 is:

**=SUMPRODUCT(--(EXACT(E4,B2:B8)),C2:C8)**

*Figure 1 – *Exact match lookup with SUMPRODUCT

In this case, standard lookups like VLOOKUP of HLOOKUP will ignore case and return the first match, which is “Apple”. However, the EXACT function will match the exact cases in the lookup_array. The result will be **29**:

*Figure 2– *Exact match lookup with SUMPRODUCT

**Explanation of formula**

How this formula works:

**EXACT(E4,B2:B8)**

**: **this portion produces an array like this

`{FALSE; FALSE; FALSE; FALSE;TRUE; FALSE;TRUE}`

– The double unary operator (–) is used to convert the array to 1 and 0. A new array is returned like this: {0;0;0;0;1;0;1}

You can also produce 1 and 0 arrays in this way: **EXACT(E4,B2:B8)*1**

– **SUMPRODUCT **then simply multiples the items in two array: {0;0;0;0;1;0;1} and {16;17;12;13;18;14;11}. The returned array is: {0;0;0;0;18;0;11}. Finally, it sums all the values and returns **28**.

**Note:**

- This formula will only work with numeric values. SUMPRODUCT doesn’t retrieve text.
- All arrays in SUMPRODUCT formula must have the same number of rows and columns otherwise you will get the #VALUE! error

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