# Converting Letters to Numbers and Vice Versa in Python: A Beginner’s Guide

## ause of its synt

ax, re

ability,

and flexibility. One of the most useful fe

a.

## In this

article, we will explore how you c

## and how you c

an convert numbers to letters in Python.

## a letter to

a number in Python, we c

an use the “ord()” function. The “ord()” function returns the Unicode code point of the ch

## ar

acter.

In other words, it returns the integer represent

## ar

acter. For ex

ample, let’s convert the letter “

A” to

“`

print(ord(‘

A’))

“`

“`

“`

## As you c

an see, the “ord()” function returns the Unicode code point of the ch

## ar

acter. The Unicode code point of “

A” is

65.

acter, you c

## an subtr

act ‘

A’ or ‘

a’ (depending on if the letter is upperc

## ase or lowerc

ase) from the result of the “ord()” function. For ex

ample, let’s convert the letter “

a” to

“`

print(ord(‘

a’) – ord(‘

a’) +

“`

“`

“`

## As you c

an see, we first used the “ord()” function to get the Unicode code point of the ch

## ar

acter “

a”. We then subtr

acted ord(‘

a’) from ord(‘

a’)

ased result.

## a number to

a letter in Python, we c

an use the “chr()” function. The “chr()” function returns the corresponding ch

## as

a string) of the given Unicode code point.

## For ex

ample, let’s convert the number

“`

“`

“`

“`

## As you c

an see, the “chr()” function returns the corresponding ch

65, which is “

A”. Using ord()

ase/upperc

## ase or upperc

ase letter in Python, we c

an use the “ord()”

and “chr()” functions together.

## a specific v

alue from the result of the “ord()” function depending on whether we w

## ase or upperc

ase letter. For ex

ample, let’s convert the number 97 to

“`

print(chr(ord(‘

a’) + 97 – 97))

“`

“`

“`

## As you c

an see, we first used the “ord()” function to get the Unicode code point of ‘

a’. We then

and used the “chr()” function to get the corresponding ch

## ar

acter of the resulting Unicode code point.

In conclusion, converting letters to numbers

## al fe

ature of Python. With the help of the “ord()”

and “chr()” functions, Python m

## at

a types.

Whether you’re working with text d

## ar

acter input, the knowledge you’ve g

## article will undoubtedly come in h

andy for your next Python project.

## As

a Python developer, you might f

## ace situ

ations where you need to convert the entire string of letters to numbers. For inst

ance, when you’re working with encryption techniques, it’s common to convert letters to numbers.

## In this

article, we’ll discuss two different w

## all letters in

a string to numbers. Convert

## a string to numbers is by using

a list comprehension.

an existing one,

and it’s

## an efficient w

ay to process elements in lists. Therefore, we c

## acter of the string

and convert them to numbers.

Here’s

## a string to numbers:

“`

string = ‘hello world’

result = [ord(i) for i in string]

“`

“`

[

104,

1,

108,

108,

1, 32,

19,

1,

14,

108,

100]

“`

## In this ex

ample, we loop through e

## acter of the string using

a list comprehension. The “ord()” function returns the Unicode code point of e

acter,

a new list.

acter, you c

## an subtr

act ‘

A’ or ‘

a’ (depending on whether the letter is upperc

## ase or lowerc

ase) from the result of the “ord()” function,

arlier. Here’s

## acter:

“`

string = ‘Hello World’

result = [ord(i) – ord(‘

a’) +

1 if i.islower() else ord(i) – ord(‘

A’) +

1 if i.isupper() else ” for i in string]

“`

“`

[8, 5,

12,

12,

15, ”, 23,

15,

18,

12, 4]

“`

## In this ex

ample, we used the list comprehension to loop through the string

ase. If the ch

## acter is lowerc

ase, we subtr

act the result of “ord(‘

a’)” from the result of the “ord()” function

ased result.

## acter is upperc

ase, we subtr

act the result of “ord(‘

A’)” from the result of the “ord()” function

## added one to get the one-b

ased result. If the ch

## ase nor upperc

ase, we

an empty string to the list.

## appending the results to

a new list. This method is more explicit th

## an using

a list comprehension,

## asier to underst

and for beginners.

Here’s

## a for loop:

“`

string = ‘hello world’

result = []

## for i in string:

result. append(ord(i))

“`

“`

[

104,

1,

108,

108,

1, 32,

19,

1,

14,

108,

100]

“`

ample, we initi

## an empty list c

alled “result”. Then, we looped through e

## a for loop

and used the “ord()” function to convert the ch

a number.

## Fin

ally, we

appended the result to the “result” list.

## ament

al concept, especi

## ation

and encryption techniques. Here

## arn more

1. Python String Methods: https://www.w3schools.com/python/python_strings_methods.

## asp

2. Unicode HOWTO: https://docs.python.org/3/howto/unicode.html

3.

Python List Comprehensions: https://www.pythonforbeginners.com/b

asics/list-comprehensions-in-python

4. 5 Re

## asons You Should Le

arn Python: https://www.codingdojo.com/blog/5-re

## arn-python

In conclusion, converting

## ated t

at first, but it’s

aster.

## and techniques provided in this

article, you’re now well-equipped to h

## andle this t

ase. Moreover, with the resources provided, you c

## ap

abilities of Python.

In conclusion, converting letters to numbers

ammer, especi

## ation

and encryption techniques. Converting

## achieved by using list comprehensions or

a for loop.

By using the “ord()”

and “chr()” functions, Python m

## at

a types. Remember to use list comprehensions for

## a concise

and efficient method, or use

ach.

## ap

abilities of Python. By m

astering this skill, you’ll enh