IGCSE Computer Science Paper 2 Definitions Worksheet: 7c Pseudocode and Flowcharts (Modules 146–155)
Name:
Date:
Class:
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Key terms
Write what each term means, in your own words.
1
'Y' "Yes" 4.0 TRUE
2
DECLARE Counter : INTEGER
3
CONSTANT HourlyRate ← 6.50
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<identifier> ← <value>
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Score ← 5
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+ - * / ^
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DIV(a, b) and MOD(a, b)
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(A + B) / 2
9
= < <= > >= <>
10
Age >= 18
Answer Key
IGCSE Computer Science Paper 2 · Modules 146–155 · Student wording will vary for definitions
1'Y' "Yes" 4.0 TRUE — Literals have fixed forms: CHAR in single quotes, STRING in double quotes, REAL with a digit each side of the point, BOOLEAN as TRUE or FALSE in capitals.
2DECLARE Counter : INTEGER — Creates a variable named Counter and states its data type (INTEGER) before it is used. The format is DECLARE <identifier> : <data type>, with a space on each side of the colon.
3CONSTANT HourlyRate ← 6.50 — Names a value set once with a literal. It never changes, needs no DECLARE, and can be updated in one place.
4<identifier> ← <value> — Assignment stores the value on the right of ← in the variable on the left. The value must match the variable's data type, e.g. Counter ← Counter + 1.
5Score ← 5 — ← stores a value in a variable, so Score ← 5 saves 5 in Score. = only tests if two values are equal, as in IF Score = 5, and gives TRUE or FALSE. <> tests not equal.
6+ - * / ^ — Pseudocode arithmetic operators: add, subtract, multiply, divide and ^ for power. Power, * and / are worked out before + and -. Division always gives a REAL result.
7DIV(a, b) and MOD(a, b) — DIV(a, b) gives the whole-number part of a divided by b, so DIV(10, 3) is 3. MOD(a, b) gives the remainder, so MOD(10, 3) is 1. Both take integers.
8(A + B) / 2 — Brackets force the work inside to be done first, so A and B are added before dividing by 2. Without them, A + B / 2 divides B by 2 first. Use them in sums and AND/OR conditions.
9= < <= > >= <> — Relational operators compare two values and give a BOOLEAN result (TRUE or FALSE). = equal, <> not equal, < less than, <= less or equal, > greater than, >= greater or equal.
10Age >= 18 — Write a condition with symbols such as >=, <> and =, not words. Age >= 18 is correct; 'Age is 18 or more' is not accepted. This applies in pseudocode and flowcharts.