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Question: Doubt in List - Answers unable to explain

Question:Doubt in List - Answers unable to explain

Ramakrishnan 399 Maple
list
December 15 2017
0


Dear colleagues, Can anyone explain what (a::list,b::list) will be understood by the programme?

I thought the programme is made for only adding the numbers in the list. But it seems there is something more than that, i could not get.

Equn label (6) onwards, I donot understand, how the answer was obtained.

Thanks for explaining.

Ramakrishnan V

with(MathematicalFunctions:-Evalf); -1; addList1 := proc (a::list, b::integer)::integer; local x, i, s; description "add a list of numbers and multiply by a constant"; x := b; s := 0; for i in a do s := s+a[i] end do; s := s*x end proc

proc (a::list, b::integer)::integer; local x, i, s; description "add a list of numbers and multiply by a constant"; x := b; s := 0; for i in a do s := s+a[i] end do; s := s*x end proc

 (1)

s := addList1([1, 2, 3, 4], 2)

20

 (2)

s := addList1([2, 2, 3, 4], 2)

22

 (3)

x := 2 = 2NULL

s := addList1([x, 2, 3, 4], 2)

22

 (4)

s := addList1([2, x, 3, 4], 2)

22

 (5)

sumList := addList1([4, 3, 1, 3, 4, 3], 2)

26

 (6)

s := addList1([4, 3, 1, 3, x, 3, 4, 3], 2)

34

 (7)

s := addList1([2, 2, 3, 4], 2)

22

 (8)

s := addList1([4, 3, 1, 8, x, 3, 4, 3], 2)

58

 (9)

x

2

 (10)

``


 

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