First Command

First( <List> )

Gives a new list that contains the first element of the given list.

Example:

First({1, 4, 3}) yields {1}.

Note: To get the first element use Element({1, 4, 3}, 1).

First( <List>, <Number n of elements> )

Gives a new list that contains just the first n elements of the given list.

Example:

First({1, 4, 3}, 2) yields {1, 4}.

First( <Text> )

Gives first character of the text.

Example:

First("Hello") yields "H".

First( <Text> , <Number n of elements> )

Gives the first n characters of the text.

Example:

First("Hello",2) yields "He".

First( <Locus>, <Number n of elements> )

This command is useful for

• loci generated by NSolveODE Command - It returns list points that were created in the first n steps of the numeric ODE-solving algorithm.
• loci generated using ShortestDistance Command, TravelingSalesman Command, Voronoi Command, MinimumSpanningTree Command and ConvexHull Command Commands - It returns vertices of the graph.

Note:

See also Last Command.