# What Is NP Arange?

An introduction to np.arange and its uses in the Python language.
Modern Times Sep 17, 2020

NumPy.arange, also called np.arange, is a core Python concept that is part of the language's array (arr) creation routines. With a NumPy array, you can define different interval (int) values and integers as well as the space between them. The resulting array follows the specified sequence.
What Is NP Arange?
NP Basics
The np.arange syntax is commonly broken into several different parameters. You'll also have a default step size for your sequence of numbers as well as your integer arguments. You can change this increment as you like though you need a consistent step size and a defined stop value or endpoint.
The Start Parameter
The first NumPy arange parameter is the "start." This, of course, is the number in your index that is the first value in the NumPy array. It's either an integer or decimal and you need uniform distribution.
The Stop Parameter
The second np.arange parameters are also known as the stop parameters. This defines the end of the original array but isn't included as an ndarray object. These point numbers are simply to further define the np increments and integer types.
The Step Parameter
After your np start and stop, you'll have your np.arange step. This number will define the spacing and input arguments between the different values in your NumPy array. Typically, with the NumPy defaults, this value will be one in your original array. You can use the np step to choose different lengths of a given interval.
The Data Type
The final np.arange parameter is the dtype. The dtype, or data type, refers to your ndarray output and defaults to "none." If you omit a data type, your np.arange function will do its best to determine a data type from your numerical ranges and parameters.
Seems Simple Enough
A NumPy arange often seems deceptively simple at first. However, as you continue to build on the initial principles, it can get more complicated than you might suspect.

So,
what is np arange? It's used for plots, rearranging rows, defining integer types, and crafting a position argument. It goes even further than that too. If you're at all interested in Python, np.arange is one of the foundational concepts you need to learn.