IGCSE Computer Science Paper 2 Word Scramble: 8.1c Procedures and Functions (Modules 429–438)
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Word scramble
Unscramble the letters and write each key term on the line.
1
RBLIRYA IUNORTE
A ready-made subroutine supplied with the language that you can call without writing it, such as ROUND, RANDOM or LENGTH. It saves time and avoids errors.
2
IVA(D, B)
Divides a by b and returns only the whole number part, discarding any remainder. DIV(10, 3) returns 3, so it counts how many whole groups of 3 fit into 10.
3
DAM(O, B)
Returns the remainder left when a is divided by b. MOD(10, 3) is 1. The result is 0 when b divides a exactly. Example: MOD(130, 60) gives the 10 leftover minutes.
4
105(IDV, 06) NDA OM5(0D1, 06)
Use DIV and MOD on the same two numbers to split a value. DIV gives the whole units (2 hours) and MOD gives what is left over (30 minutes). Check: DIV * b + MOD gives a back.
5
VRAOL(UNEDU, ALSCPE)
Library routine that returns value rounded to the given number of decimal places. ROUND(3.14159, 2) gives 3.14. If places is 0, the result is a whole number.
6
DMONRA()
A library routine with empty brackets that returns a random REAL number from 0 to 1 inclusive, a different value each time it is called. Store it, e.g. Num ← ______
7
NAORD(DRNUMO() * 6, 0)
Gives a random whole number from 0 to 6. RANDOM() gives a decimal from 0 to 1, times 6 stretches it, and ROUND(..., 0) turns it into a whole number.
8
TRRNEU CDORN(EUIPR, 2)
Your own subroutine can call a library routine such as ROUND, MOD, DIV or RANDOM in its statements and use the value it gives back, for example in a RETURN.
9
LLCA NEI5(L)
Calls the Line procedure written once, so the same code is reused many times with different parameters instead of being repeated in the program.
Answer Key
IGCSE Computer Science Paper 2 · Modules 429–438
1RBLIRYA IUNORTE → library routine — A ready-made subroutine supplied with the language that you can call without writing it, such as ROUND, RANDOM or LENGTH. It saves time and avoids errors.
2IVA(D, B) → DIV(a, b) — Divides a by b and returns only the whole number part, discarding any remainder. DIV(10, 3) returns 3, so it counts how many whole groups of 3 fit into 10.
3DAM(O, B) → MOD(a, b) — Returns the remainder left when a is divided by b. MOD(10, 3) is 1. The result is 0 when b divides a exactly. Example: MOD(130, 60) gives the 10 leftover minutes.
4105(IDV, 06) NDA OM5(0D1, 06) → DIV(150, 60) and MOD(150, 60) — Use DIV and MOD on the same two numbers to split a value. DIV gives the whole units (2 hours) and MOD gives what is left over (30 minutes). Check: DIV * b + MOD gives a back.
5VRAOL(UNEDU, ALSCPE) → ROUND(value, places) — Library routine that returns value rounded to the given number of decimal places. ROUND(3.14159, 2) gives 3.14. If places is 0, the result is a whole number.
6DMONRA() → RANDOM() — A library routine with empty brackets that returns a random REAL number from 0 to 1 inclusive, a different value each time it is called. Store it, e.g. Num ← RANDOM()
7NAORD(DRNUMO() * 6, 0) → ROUND(RANDOM() * 6, 0) — Gives a random whole number from 0 to 6. RANDOM() gives a decimal from 0 to 1, times 6 stretches it, and ROUND(..., 0) turns it into a whole number.
8TRRNEU CDORN(EUIPR, 2) → RETURN ROUND(Price, 2) — Your own subroutine can call a library routine such as ROUND, MOD, DIV or RANDOM in its statements and use the value it gives back, for example in a RETURN.
9LLCA NEI5(L) → CALL Line(5) — Calls the Line procedure written once, so the same code is reused many times with different parameters instead of being repeated in the program.