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Built-in Mathematica Symbol

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First

First[expr]
gives the first element in expr.

MORE INFORMATION

First[expr] is equivalent to expr[[1]].

Basic Examples (3)

Extract the first element of a list:

Extract the first row of a matrix:

The head need not be List:

Generalizations & Extensions (1)

Properties & Relations (1)

Possible Issues (2)

Part Last Rest Take Select

Getting Pieces of Lists

Elements of Lists

List Manipulation

Parts of Expressions

New in 1

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