An integer literal is a direct representation of an integer value written in the source code. In Python, integer literals can specify different numeric bases through prefixes:
10→ decimal (base 10)0b100→ binary (base 2)0o11→ octal (base 8)0x1F→ hexadecimal (base 16)
When using int(string, base=0), the argument base=0 tells Python to interpret the base of the string automatically, following the same rules as integer literals. For example:
>>> int('0b100', base=0)
4
This behaviour allows Python to recognise prefixes like 0b, 0o, or 0x and convert the string to the corresponding integer value.
