Python cast to char

How to Convert ASCII to Char in Python

In this post, we will discuss how to convert ASCII to char in Python. Based on this program we will also develop a Python program to print all alphabet from ASCII value.

ASCII stands for American Standard Code for Information Interchange. It was developed by the ANSI (American National Standards Institute) and it is used to interchange the information from a high-level language to low-level language. Machine or Computer understand only binary languages. So, the character data type represents integers. For example, the ASCII value of the letter ‘A’ is 65.

Python Program to Convert ASCII to Char

We are using the chr() function to convert the ASCII value to the character. Which is a built-in function in Python that accepts a specified Unicode (ASCII value) as an argument and returns the character.

The syntax of chr() is:

Where num is an integer value.

chr() Parameters:

chr() method takes a single parameter, an integer i. The valid range of the integer is from 0 through 1,114,111.

Return value from chr():

The chr() method returns a character whose Unicode point is num, an integer. If an integer is passed that is outside the range then the method returns a ValueError.

# Python program to convert ASCII to character # take input num = int(input("Enter ASCII value: ")) # printing character print("Character =", chr(num))

Output for the different input values:-

Enter ASCII value: 64
Character = @

Enter ASCII value: 69
Character = E

Enter ASCII value: 95
Character = _

Enter ASCII value: 107
Character = k

How to Print Alphabet From ASCII in Python

In the previous program, we will convert ASCII to a character but in this program, we will discuss how to print all alphabet from ASCII value (upper case and lower case). We are using map(), chr() and range() function to print all alphabet. The map() is a built-in function that applies a function on all the items of an iterator given as input.

# Python program to print all alphabet from ascii value # using map() and char() function list_upper = list(map(chr, range(65, 91))) list_lower = list(map(chr, range(97, 123))) # print uppercase alphabets print('Uppercase Alphabets: ', list_upper) # print lowercase alphabets print('Lowercase Alphabets: ', list_lower)

Uppercase Alphabets: [‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’, ‘G’, ‘H’, ‘I’, ‘J’, ‘K’, ‘L’, ‘M’, ‘N’, ‘O’, ‘P’, ‘Q’, ‘R’, ‘S’, ‘T’, ‘U’, ‘V’, ‘W’, ‘X’, ‘Y’, ‘Z’]Lowercase Alphabets: [‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’, ‘g’, ‘h’, ‘i’, ‘j’, ‘k’, ‘l’, ‘m’, ‘n’, ‘o’, ‘p’, ‘q’, ‘r’, ‘s’, ‘t’, ‘u’, ‘v’, ‘w’, ‘x’, ‘y’, ‘z’]

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How to Convert Int to Char in Python

To convert int to char in Python, you can use the “chr()” method. For example, the “ chr(97)” expression returns “a”. The chr() method returns a character (a string) from an integer (it represents the Unicode code point of the character).

Syntax

Parameters

i: The chr() method takes a single parameter which is an integer.

Return Value

The chr() function returns a character (a string) whose Unicode code point is the integer.

Example 1: How to Use chr() method

Let’s use the chr() function to convert int to a character.

print(chr(97)) print(chr(65)) print(chr(1100))

And we get the characters in the output concerning its ASCII value. For example, the chr() method returns a character whose Unicode point is num, an integer.

Example 2: Integer passed to chr() is out of the range

If we pass the negative value to the chr() function, then it returns ValueError: chr() arg not in range(0x110000).

Traceback (most recent call last): File "/Users/krunal/Desktop/code/pyt/database/app.py", line 7, in print(chr(-1)) ValueError: chr() arg not in range(0x110000)

We have passed an integer outside the range, and then the method returns a ValueError.

Example 3: Convert a list of integers to characters

To create a list in Python, you can use the [ ] and add the values inside it.

listA = [69, 72, 78, 81, 90, 99] for number in listA: char = chr(number) print("Character of ASCII value", number, "is ", char)

Character of ASCII value 69 is E Character of ASCII value 72 is H Character of ASCII value 78 is N Character of ASCII value 81 is Q Character of ASCII value 90 is Z Character of ASCII value 99 is c

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Convert Integer to Char in Python

In this tutorial, we will look at how to convert an integer to a char in Python with the help of some examples. We’ll be looking at use-cases of finding the char (string) representing a character whose Unicode point is the integer.

How to convert integer to char in Python?

You can use the Python built-in chr() function to get the character represented by a particular integer in Unicode. The following is the syntax –

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Pass the integer as an argument. The valid range for the integer argument is from 0 through 1,114,111 (0x10FFFF in base 16). If you pass an integer outside of this range, it will result in a ValueError .

Examples

Let’s look at some examples of using the above syntax –

Get the character represented by a number in Unicode

Let’s pass the integer 65 to the chr() function.

# integer to char ch = chr(65) # display char and its type print(ch) print(type(ch))

We get ‘A’ from the function. The number 65 points to the character ‘A’ in Unicode.

Let’s look at another example.

# integer to char ch = chr(44) # display char and its type print(ch) print(type(ch))

We get the comma character, ‘,’ for the integer 44.

You can use the Python built-in ord() function to get the corresponding integer for a character in Unicode.

# char to integer print(ord('A')) print(ord(','))

We get 65 for the character ‘A’ and 26 for the character ‘$’.

What if you pass a negative integer to the above function?

Let’s pass a negative integer to the chr() function as an argument.

# integer to char ch = chr(-65) # display char and its type print(ch) print(type(ch))

--------------------------------------------------------------------------- ValueError Traceback (most recent call last) Input In [20], in 1 # integer to char ----> 2 ch = chr(-65) 3 # display char and its type 4 print(ch) ValueError: chr() arg not in range(0x110000)

We get a ValueError . This is because the passed integer is outside the valid range of 0 through 1,114,111.

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Author

Piyush is a data professional passionate about using data to understand things better and make informed decisions. He has experience working as a Data Scientist in the consulting domain and holds an engineering degree from IIT Roorkee. His hobbies include watching cricket, reading, and working on side projects. View all posts

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How to convert an integer to a character in Python?

Python’s built-in function chr() returns a sunicode character equivalent of an integer between 0 to 0x10ffff.

>>> chr(a) 'd' >>> chr(300) 'Ĭ' >>> chr(65) 'A'

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