1l

1l is an ambiguous term that can refer to different concepts depending on context. It is commonly encountered as a quantity or a programming literal.

As a unit of volume, 1 liter (often written as 1 L or 1 l) equals 1 cubic decimeter, or 0.001 cubic meters. The liter is a non-SI unit but is accepted for use with the SI. It is widely used worldwide to measure liquids and other bulk volumes. The symbol L (uppercase) is preferred in many style guides to distinguish it from the lowercase letter l. The liter has several submultiples, such as milliliter (mL) and deciliter (dL), and is related to the cubic centimeter (cm³), since 1 L = 1000 cm³. Spelling varies by region: “liter” (American) and “litre” (British/Commonwealth).

In computing, 1l (often written 1L) denotes a long integer literal in several programming languages, including C, C++, and Java. The suffix indicates that the value should be treated as a long integer rather than a regular int. The suffix can be written as lowercase 'l' or uppercase 'L', but many style guides discourage using the suffix at all because it can be mistaken for the digit 1. Examples include 1L in Java for a long with value 1, or 1L in C/C++ as a long integer literal.

Other uses of the string may occur in product labeling (for example, “1L bottle”) to indicate volume. The meaning is typically inferred from the surrounding context.

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