How do you create an array from 1 to 10 in python?

To create a list with the numbers from 1 to n using Python, we can use the range() function in a custom Python function.

def listFrom1toN(n):
    return list(range(1,n+1))

print(listFrom1toN(13))

#Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]

You can also use a loop to create a list from 1 to n in Python.

def listFrom1toN(n):
    list_from_1_to_n = []
    for x in range(1,n+1):
        list_from_1_to_n.append(x)
    return list_from_1_to_n

print(listFrom1toN(5))

#Output:
[1, 2, 3, 4, 5]

When working with numbers in a Python program, it’s possible you want to create an array from 1 to n in Python.

Arrays in Python are called lists, and we can easily create a list of the numbers 1 to n in our Python code.

The range() function takes in 3 arguments. The first is the starting point, the second is the ending point, and the third argument is the step size.

For example, if I want all the numbers between 1 and 10, I’d call the range function in the following way.

numbers_1_to_10 = list(range(1,11))

We can define a function which will create a list from 1 to n.

Below is an example of a function in Python which returns a list with numbers from 1 to n.

def listFrom1toN(n):
    return list(range(1,n+1))

print(listFrom1toN(13))

#Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]

Using a Loop to Create a List from 1 to n in Python

We can also use a loop to create a list with the numbers from 1 to n in Python.

Let’s modify our function from above to use a loop to create a list from 1 to n. First, we need to initialize an empty list. Then we will loop over the numbers in the range from 1 to n, and append to our list.

Below is a function which will create and return a list from 1 to n with a for loop.

def listFrom1toN(n):
    list_from_1_to_n = []
    for x in range(1,n+1):
        list_from_1_to_n.append(x)
    return list_from_1_to_n

print(listFrom1toN(5))

#Output:
[1, 2, 3, 4, 5]

Hopefully this article has been useful for you to learn how to create a list from 1 to n with Python.

An array is a collection of items of same type stored at contiguous memory locations. To access the elements, you only need to know the memory address of the first item of an array which is also known as base address. You can access all other items or traverse in an array by simply adding an offset to this base address. Python lists can also be treated as arrays but the lists can store multiple data items of different datatypes. This article is about how to create an array of numbers 1 to N in Python. If you want to learn more about Python Programming, Visit Python Programming Tutorials.

There are different methods to create an array of Numbers 1 to N in python. In this article, we’ll discuss the following.

• CREATION OF AN ARRAY OF NUMBERS 1 TO N USING A RANGE() FUNCTION IN PYTHON.
• CREATE AN ARRAY USING THE USER-DEFINED FUNCTION
• CREATING AN ARRAY USING A NUMPY-ARANGE() FUNCTION
• CREATE AN ARRAY USING PYTHON MODULE ARRAY

In the first three methods, we’ll see how lists can be treated as arrays. Python has a module called array which is used to work only with specific data values. The last method discusses how to create an array using this module. Lets discuss all these methods in detail.

CREATING AN ARRAY USING THE RANGE() FUNCTION

As discussed previously, python lists can be treated as arrays. To create an array of a certain range we can use the range() function as it specifies the range of the list and then typecast the range() by using the list command as shown in the code below. We can set the range of the list from 1 to N and N should be any integer number.

CODE:

#Creation of an array using Range() Function

list = list(range(1,8))

print(list)

[1, 2, 3, 4, 5, 6, 7]

creating an array by a user-defined function

Another way is to create a function and pass the length of an array as a parameter to this function. In the example below, we have created a function by the name of List-Function. The function takes parameter ‘n’ which represents the length of the array. In this function, a for loop is used which treats n as the last index of the array and append the number in the List_array starting from 0 up to the maximum length ‘n’ as shown below.

CODE:

def List_function(n):
    list_array = []
    for i in range(n+1):
        list_array.append(i)
    return(list_array)

print(List_function(10))

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

cREATING AN ARRAY USING nUMPY.ARANGE() FUNCTION

The numpy library provides an arrange() function which takes two parameters as an integers and generate the numbers starting from the first parameter upto the last parameter. Typecast the arange() function using the list command and an array is created.

import numpy as np
list_array = list(np.arange(1,13+1))
print(list_array)

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]

numpy.arange() is used to create an array of large sizes.

CREATE AN ARRAY USING PYTHON MODULE ARRAY

An array module of python is used to create an array consisting of elements or items of same datatypes. The array module takes two arguments as an input. The first one is datatype of an array such as ‘i’ for integer. All other datatypes are given in the this link. The second argument consists of the elements or items of an array.

def display(n,s):
  print ("The array created consists of following items: ", end =" ")
  for i in range (0, s):
    print (n[i], end =" ")
  print(" ")

import array as arr
# creating an array of integer datatype
arr1 = arr.array('i', [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
#print array
display(arr1,len(arr1))

# creating an array of float datatype
arr2 = arr.array('d', [0.5, 5.21, 3.14])
#print array
display(arr2,len(arr2))

The array created consists of following items:  1 2 3 4 5 6 7 8 9 10  
The array created consists of following items:  0.5 5.21 3.14 

In the example above, we have created two arrays arr1 and arr2 of integers and floating numbers. The function display here is used to print the contents of an array created. It takes two arguments: an array ‘n’ and the size of array ‘s’ created.

There are different operations that can be carried out on arrays such as insertion, deletion, sorting arrays into ascending and descending order etc. Try them on your own. If you have any query regarding this topic or any other topic related to python programming language, let us know in the comments or contact us.

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