This guide explains int() Function: Usage and Examples through a focused example and practical reasoning. No prior knowledge of this specific operation is required.
Understanding the Concept
int() creates an integer from a suitable number or parses a whole-number string. Parsing permits a base argument for strings; converting a float discards the fractional part toward zero. Invalid strings raise ValueError.
When You Would Use This
An inventory importer receives hexadecimal product codes and ordinary quantity text.
Step-by-Step Example
item_count = int("18")
hex_value = int("2A", 16)
truncated_value = int(-4.9)
print(item_count, hex_value, truncated_value)How the Example Works
The output is 18 42 -4. Base 16 interprets 2A as hexadecimal. Conversion of -4.9 truncates toward zero, giving -4 rather than -5.
Example Output
18 42 -4Try It Yourself
Convert binary text "101101" to decimal; predict the result first.
Common Beginner Mistakes
- Passing
"12.0"directly toint()and expecting it to parse. - Confusing
int()conversion with mathematical rounding. - Forgetting the base is only supplied when parsing a string, bytes or bytearray.
Key Takeaways
int()creates an integer from a suitable number or parses a whole-number string.- The output is
18 42 -4. - Avoid this mistake: Passing
"12.0"directly toint()and expecting it to parse.