# Author's software

#### Being tested

The number of arithmetic progression

Writing functions:

arphn(a, b, c)

Where:

a - the first member of progression, b - step or difference of progression, c - the number of progression

A function that performs a mathematical function, the arithmetic progression number, is one of the key tools in the field of programming. An arithmetic progression, in turn, is a sequence of numbers in which the difference between any two adjacent elements is a constant value, which we usually denote as "d".

At the end, the function returns the resulting arithmetic progression.

Now we can use this function to get numbers in arithmetic progression. For example, if we want to get the first 5 numbers in an arithmetic progression with the first element "2" and the difference "3", then we can call the function as follows:

nums = arphn(2, 3, 5)

This code will return [2, 5, 8, 11, 14] - the first five numbers are in arithmetic progression.

Thus, a function that performs a mathematical function - an arithmetic progression number, is a useful programming tool that allows you to get the necessary numbers in an arithmetic progression using a small code. This makes it possible to simplify and automate many tasks related to mathematical operations in programming.

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