##### Using the DELTA function:

The arguments for the DELTA function are:

Argument | Required? | Description |
---|---|---|

number1 | Required | The first number. |

number2 | Optional | The second number. If omitted, number2 is assumed to be zero. |

The DELTA function tests whether two values are equal. DELTA returns 1 if number1 = number2; returns 0 otherwise. 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.

The arguments for the DELTA function are:

Argument | Required? | Description |
---|---|---|

number1 | Required | The first number. |

number2 | Optional | The second number. If omitted, number2 is assumed to be zero. |

The DELTA function tests whether two values are equal.