lambdas

Eleventh Greek letters

Lambdas are anonymous functions in programming—small blocks of code defined without a name, typically used once or passed as arguments to other functions.

The term comes from lambda calculus, a mathematical system for expressing computation.

In languages like Python, JavaScript, and Java, lambdas enable concise, inline function definitions: sorted(names, key=lambda x: x.lower()).

The Greek letter lambda (λ) symbolizes these functions in formal notation.

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