Pseudocode Structure

Question 1

Variable assignment

Answer 1

var ← exp

Question 2

One dimensional array assignment

Answer 2

var[iexp] ← exp

Remember indexing starts at 1 not 0

Question 3

Two dimensional array assignment

Answer 3

var[iexp1][iexp2] ← exp

Question 4

Array initialisation of n elements

Answer 4

var ← [exp1, exp2, … , expn]

Question 5

Conditional (if AND else statements) branching

Answer 5

IF bexp THEN
statements
ELSE 
statements
ENDIF

Question 6

Conditional execution (no alternative branching / else)

Answer 6

IF bexp THEN
statements
ENDIF

Question 7

Multi‐branching conditional with n choices.

Answer 7

CASE exp OF 
exp1: statements 
...
expn: statements 
ELSE statements 
ENDCASE

Question 8

Conditional looping with the condition at the start of the loop / while loop

Answer 8

WHILE bexp
statements
ENDWHILE

Remember no colon

Question 9

Count controlled looping / for loop

Answer 9

FOR var ← iexp1 TO iexp2
statements
ENDFOR

Remember no colon and no ‘in’

Question 10

Conditional looping with the condition at the end of the loop. The loop must always execute at least once.

Answer 10

REPEAT
statements
UNTIL bexp

Question 11

raw_input equivalent

Answer 11

USERINPUT

Question 12

Function definition with n (possibly none) parameters.

Answer 12

FUNCTION fname(param1,…,paramn)
statements
ENDFUNCTION

Remember the statements must include at least one RETURN statement

Question 13

Procedure definition with n (possibly none) parameters.

Answer 13

PROCEDURE pname(param1,…,paramn)
statements
ENDPROCEDURE

Question 14

Modulo operator / remainder percentage sign thing

Answer 14

iexp1 MOD iexp2

Question 15

Function that returns integer value that is length of an array or a string / length of…

Answer 15

LEN (var)

Question 16

Returns the nth line of an external file (indexing starts at one)

Answer 16

READLINE(file, n)

Question 17

(Over)Writes the nth line of file with value. If n exceeds the previous line numbers of file plus one then the gap is filled with blank lines.

Answer 17

WRITELINE(file, n, value)

Question 18

Print equivalent

Answer 18

OUTPUT “ “