IGCSE Computer Science Paper 2 Definitions Worksheet: 7a Program Development Life Cycle (Modules 27–36)
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Key terms
Write what each term means, in your own words.
1
CONSTANT HourlyRate ← 6.50
2
Counter ← 0
3
INPUT Answer
4
OUTPUT
5
+ - * / ^
6
DIV(a, b)
7
MOD(a, b)
8
= < <= > >= <>
9
AND OR NOT
10
Age >= 18
Answer Key
IGCSE Computer Science Paper 2 · Modules 27–36 · Student wording will vary for definitions
1CONSTANT HourlyRate ← 6.50 — Names a fixed literal value that never changes while the program runs. It makes code easier to read, and you update the value in one place only.
2Counter ← 0 — The ← assignment operator stores the value on its right in the variable on its left. Here 0 is stored in Counter. The value must match the variable's data type.
3INPUT Answer — INPUT followed by a variable name reads a value typed by the user and stores it in that variable. Use one variable per INPUT, and OUTPUT a prompt first.
4OUTPUT — Displays text or values on screen. Text goes in quotes. Items are separated by commas, e.g. OUTPUT "You have ", Lives, " lives left". Also used for user prompts.
5+ - * / ^ — Arithmetic operators: add, subtract, multiply, divide and power. ^ is worked out first, then * and /, then + and -. Brackets change or clarify the order.
6DIV(a, b) — Returns the whole-number quotient of a divided by b, discarding the fractional part. For example, DIV(10, 3) returns 3. Both a and b are integers.
7MOD(a, b) — Returns the remainder when a is divided by b. For example MOD(10, 3) gives 1. MOD(n, 2) = 0 means n is even.
8= < <= > >= <> — Relational operators compare two values and give TRUE or FALSE: = equal, < less, <= at most, > greater, >= at least, <> not equal. Use = to compare, ← to assign.
9AND OR NOT — Logical operators that combine BOOLEAN conditions: AND needs both true, OR needs at least one true, NOT reverses a condition. Use brackets in complex ones, e.g. Age >= 0 AND Age <= 120.
10Age >= 18 — A precise condition uses a relational symbol and exact values, like Age >= 18. Words such as 'Age is old enough' or 'greater than' are too vague and lose marks.