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Last Updated : 01 Feb, 2024
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Hexadecimal representation is commonly used in computer science and programming, especially when dealing with low-level operations or data encoding. In Python, converting a hex string to an integer is a frequent operation, and developers have multiple approaches at their disposal to achieve this task. In this article, we will explore various methods to convert a hex string to an integer in Python, providing a comprehensive guide for Geeks.
Python Convert Hex String To Integer
Below are some of the ways by which we can convert hex string into integer in Python:
Python Convert Hex String To Integer Using
int()functionThe int() function in Python is a versatile built-in function that can be utilized for converting strings to integers. It takes two parameters: the string to be converted and an optional base argument. When converting a hex string to an integer, setting the base argument to 16 is essential.
Python3
hex_string="1a"decimal_integer=int(hex_string,16)print(decimal_integer)Output
26
Convert Hex String To Integer Using
int()with Base 0In this example, the hexadecimal string “0xfa22” is converted to an integer using the `int()` function with base 0, allowing automatic detection of the input string’s base. The resulting `decimal_integer` is 64034.
Python3
hex_string="0xfa22"decimal_integer=int(hex_string,0)print(decimal_integer)Output
64034
Python Convert Hex String To Integer Using the literal_eval() method
In this example, the hexadecimal string “0xfe00” is converted to an integer using the `literal_eval()` function from the `ast` module. The resulting `ans` variable holds the decimal integer value 65024.
Python3
fromastimportliteral_evalhex_str="0xfe00"ans=literal_eval(hex_str)print(ans)Output
65024
Convert Hex String To Integer Using format() Method
In this example, the hexadecimal string “ff” is first converted to an integer using `int(hex_string3, 16)`, resulting in 255. Then, the integer is formatted as a decimal string using `format()` with base 10 (‘d’). Finally, the formatted string is converted back to an integer using `int()`, yielding the same decimal integer value of 255.
Python3
hex_string3="ff"decimal_integer3=int(format(int(hex_string3,16),'d'))print(decimal_integer3)Output
255
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