2.1 Algorithms - flow diagrams

Question 1

terminal

Answer 1

shows start and end of an algorithm

rounded oval shape

Question 2

input/ouput

Answer 2

shows input or output of data

parallelagram

Question 3

decision/selection

Answer 3

shows yes/no or true/false decisions where there are two possible outcomes

rhombus shape

Question 4

process

Answer 4

shows data processing e.g. a calculation

rectangle

Question 5

subroutine

Answer 5

shows a function or procedure that has its own flow diagram

rectangle split into a main part with two smaller rectangles

Question 6

line

Answer 6

represents control passing between the other symbols

Question 7

Draw a flow chart for an algorithm to find the sum of 10 numbers and output the result [5]

Answer 7

start

entered = 0
sum = 0

INPUT
number

sum = sum + number
entered = entered + 1

Is entered = 10?

NO
(return to INPUT)

YES

OUTPUT
sum

end