The DELTA function tests whether two values are equal. It returns 1 if number1 = number2; returns 0 otherwise. You can use this function to filter a set of values. For example, by summing several DELTA functions you calculate the count of equal pairs. This function is also known as the Kronecker Delta function.

**Syntax**: =DELTA (number1, [number2])

The DELTA function syntax has the following arguments:

**Number1**Required. The first number.-
**Number2**Optional. The second number. If omitted, number2 is assumed to be zero.

**Example**: Let’s look at some Excel DELTA function examples and explore how to use the DELTA function as a worksheet function in Microsoft Excel:

**Syntax**: =DELTA(A2,B2)

**Result**:

Based on the Excel spreadsheet above, the following DELTA examples would return:

**Syntax**: =DELTA(A3,B3)

**Result**: 0

**Syntax**: =DELTA(A4,B4)

**Result**: 0

**Syntax**: =DELTA(A5,B5)

**Result**: 1

**Syntax**: =DELTA(A6,B6)

**Result**: 0

**Syntax**: =DELTA(A7,B7)

**Result**: 1

**Syntax**: =DELTA(A8,B8)

**Result**: 0

**Syntax**: =DELTA(A9,B9)

**Result**: 0

**Syntax**: =DELTA(A10,B10)

**Result**: 1

**Syntax**: =DELTA(A11,B11)

**Result**: 1

**Syntax**: =DELTA(A12,B12)

**Result**: 0

**Syntax**: =DELTA(A13,B13)

**Result**: 0

**Note**:

- If number1 is nonnumeric, DELTA returns the #VALUE! error value.
- If number2 is nonnumeric, DELTA returns the #VALUE! error value.