Lambda（大写Λ，小写λ，中文音译：兰布达），是第十一个希腊字母。

Python编程语言使用lambda来创建匿名函数

大写Λ用于：

小写λ用于：

西里尔字母的“Л”字母是由“Lambda”演变而成。

Lambda (uppercase Λ, lowercase λ; Greek:Λάμ(β)δα lam(b)da) is the 11th letter of the Greek alphabet. In the system of Greek numerals lambda has a value of 30. Lambda is related to the Phoenician letter Lamed . Letters in other alphabets that stemmed from lambda include the Latin L and the Cyrillic letter El (Л, л). The ancient grammarians and dramatists give evidence to the pronunciation as [laːbdaː] (λάβδα) in Classical Greek times. In Modern Greek the name of the letter, Λάμδα, is pronounced [lamða]; the spoken letter itself has the sound of "l" as with Latinate "L".