Convert String to Int in Python

Python provides a built-in function, int(), to convert a string representation of a number into an integer.

Syntax

• string: The string to be converted.
• base (optional): The numerical base of the input string (e.g., binary, octal, decimal, hexadecimal). The default is 10.

Examples

1. Basic Conversion

2. Converting Strings with Different Bases

• Binary (Base 2):

• Hexadecimal (Base 16):

3. Handling Strings with Leading Whitespace

The int() function ignores leading and trailing whitespace.

4. Converting a String with a Floating Point

Attempting to convert a string containing a floating-point number directly to an integer will raise an error. Convert it to a float first if needed.

5. Error Handling

If the string cannot be converted into an integer, a ValueError is raised.

Output:

Important Notes

1. Input Validation: Always validate the string before converting, especially when taking user input.
2. Performance: The int() function is optimized and works efficiently even with large numbers.

Using the int() function ensures a reliable and straightforward way to convert strings to integers in Python.