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Built-in Functions

Programming

Functional Programming

FoldList

Usage

• FoldList[f, x, {a, b, ... }] gives {x, f[x, a], f[f[x, a], b], ... }.

Notes

• Example: FoldList[f, x,

a, b, c

]

.

• FoldList[Plus, 0, list] generates cumulative sums of the elements in list.

• Example: FoldList[Plus, 0,

a, b, c

]

.

• With a length

list, FoldList generates a list of length

.

• The head of list in FoldList[f, x, list] need not be List.

• See Section 2.2.2.

• See also: Fold, NestList, ComposeList, Partition, MapIndexed.

• New in Version 2.

Further Examples

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