What is Python ord() function?

The Python ord() function is used to return an integer of the given single Unicode character. The returned integer represents the Unicode code point.

Inversely, the Python chr() function takes a Unicode code point (integer) and returns a string.

Tip: The Unicode code point is given the meaning by Unicode standard, which is a number.

See the section below for learning how to use the ord() and chr() functions with examples.

An example of using Python ord() function

In this simple example, the code point of the letter ‘B’ is returned by using the ord() function.

# An example of ord() function


print("The Unicode code point for B = " ,ord('B'))

Output:

ord function

The code points of numbers 0-9 by using range example

In the following example, a range of 10 numbers (0-9) is created. A for loop is used to iterate through the range. The ord Python function is used to display the code point of each number in the range.

#Know Unicode code points of numbers by ord() function


for x in range(10):

    print ("The Unicode code point of",x ,'=' ,ord(str(x)))

Output:

Python ord

As range items are numbers, so it will produce an error if directly used in the ord() function. As such, ord() takes a string, so str() function is used for converting the number into the string.

A user entered character example

For this example, the character is taken by the user by using the input function. Enter a single character and ord() function will return the Unicode code point of that character. Have a look:

str_ord = input("Enter a character?")

cde_pt = ord(str_ord)


print("The Unicode code point of the character",str_ord ,"=" ,cde_pt)

Output:

ord input

The chr() function example

The chr(i) method is the inverse of ord() function; it takes Unicode code point (which is an integer number) and returns a string.

In this example, different codes are given in the chr() function and its returned values are displayed:

#A demo of using chr() function



print("Unicode code point 65 = ", chr(65))

print("Unicode code point 36 = ", chr(36))

print("Unicode code point 36 = ", chr(163))

print("Unicode code point 36 = ", chr(38))



print("Unicode code point 1114112 = ", chr(1114112))

chr

The chr() function has certain range which is 0 through 1,114,111 (0x10FFFF in base 16). If you enter a value which is out of the range, an error (ValueError) occurs as shown in the last part of this example.

An example of using range with chr()

For the final example, this is the inverse of the example that we used with Python range and ord() function. This time, a range is created between 65 – 80 numbers that are used as the argument in the chr() function as follows:

for x in range(65,80,1):

    print ("code point",x ,'=' ,chr(x))

Result:

chr alphabets

You can see, the characters from A-O are displayed.

Author - Atiq Zia

Atiq is the writer at jquery-az.com, an online tutorial website started in 2014. With a passion for coding and solutions, I navigate through various languages and frameworks. Follow along as we unravel the mysteries of coding together!