Python
Intermediate
What is Walrus Operator?
The := operator that assigns a value to a variable as part of an expression, introduced in Python 3.8.
The walrus operator (:=) combines assignment and expression evaluation. Instead of writing n = len(a); if n > 10, you can write if (n := len(a)) > 10. This is useful in while loops, list comprehensions, and conditional expressions.
Named after its resemblance to walrus eyes and tusks. It reduces code duplication when a value is needed both for a check and for subsequent use. Use sparingly to maintain readability.