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GCSE & A-Level OCR J277 AQA 8525 CIE 0478 / 9618 No server. No login.

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OCR Pseudocode J277 Exam Reference Language

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Quick Reference: Python vs OCR vs AQA vs CIE ▼

Construct	Python	OCR ERL	AQA	CIE
Assignment	`x = 5`	`x = 5`	`x ← 5`	`x ← 5`
Output	`print(x)`	`print(x)`	`OUTPUT x`	`OUTPUT x`
Input	`x = input("p")`	`x = input("p")`	`OUTPUT "p" x ← USERINPUT`	`OUTPUT "p" INPUT x`
Comment	`# note`	`// note`	`# note`	`// note`
Not equal	`!=`	`!=`	`≠`	`<>`
Equal	`==`	`==`	`=`	`=`
If	`if x:`	`if x then` / `endif`	`IF x THEN` / `ENDIF`	`IF x THEN` / `ENDIF`
For loop	`for i in range(5):`	`for i = 0 to 4` / `next i`	`FOR i ← 0 TO 4` / `ENDFOR`	`FOR i ← 1 TO 5` / `NEXT i`
While loop	`while x:`	`while x` / `endwhile`	`WHILE x` / `ENDWHILE`	`WHILE x DO` / `ENDWHILE`
Function	`def f(x):`	`function f(x)` / `endfunction`	`SUBROUTINE f(x)` / `ENDSUBROUTINE`	`FUNCTION f(x) RETURNS <type>` / `ENDFUNCTION`
Procedure	`def f(x): # no return`	`procedure f(x)` / `endprocedure`	`SUBROUTINE f(x)` / `ENDSUBROUTINE`	`PROCEDURE f(x)` / `ENDPROCEDURE`
Modulo / Integer div	`% //`	`MOD DIV`	`MOD DIV`	`MOD DIV`
String length	`len(s)`	`s.length`	`LEN(s)`	`LENGTH(s)`
Upper / Lower	`s.upper()`	`s.upper`	`UPPER(s)`	`UCASE(s)`
Substring	`s[2:5]`	`s.subString(2, 3)`	`SUBSTRING(2, 5, s)`	`MID(s, 3, 3)` (1-indexed)
Random integer	`random.randint(1,6)`	`Random(1, 6)`	`RANDOM_INT(1, 6)`	`INT(RAND(6)) + 1`
Cast to int	`int(x)`	`int(x)`	`STRING_TO_INT(x)`	`INT(x)`
File: open read	`with open("f.txt") as f:`	`f = open("f.txt")`	`f ← OPENREAD("f.txt")`	`OPENFILE "f.txt" FOR READ`
File: open write	`with open("f.txt","w") as f:`	`f = open("f.txt")`	`f ← OPENWRITE("f.txt")`	`OPENFILE "f.txt" FOR WRITE`
File: read line	`line = f.readline()`	`line = f.readLine()`	`line ← f.READLINE()`	`READFILE "f.txt", line`
File: write line	`f.write("text")`	`f.writeLine("text")`	`f.WRITELINE("text")`	`WRITEFILE "f.txt", "text"`
File: close	`# auto (with block)`	`f.close()`	`f.CLOSE()`	`CLOSEFILE "f.txt"`

CIE note: Same pseudocode standard for IGCSE (0478/0984) and A Level (9618). The attached guide is A Level but GCSE syntax is identical. CIE for-loops are 1-indexed by default and use NEXT i (not ENDFOR). WHILE loops require DO. Not-equal is <> (not ≠ or !=).