AND ARRAY BEGIN BY CASE CONST DEFINITION DIV DO ELSE ELSIF END EXIT EXCEPT EXPORT FINALLY FOR FORWARD FROM IF IMPLEMENTATION IMPORT IN LOOP MOD MODULE NOT OF OR PACKEDSET POINTER PROCEDURE QUALIFIED RECORD REM RETRY REPEAT RETURN SET THEN TO TYPE UNTIL VAR WHILE WITH
The keywords EXCEPT, FINALLY, FORWARD, PACKEDSET, REM, and RETRY were added for ISO Modula-2.
The keywords AND, DIV, IN, MOD, NOT, OR, and REM are called operator keywords; the rest are punctuation keywords.
ABS BITSET BOOLEAN CARDINAL CAP CHR CHAR COMPLEX CMPLX DEC DISPOSE EXCL FALSE FLOAT HALT HIGH IM INC INCL INT INTERRUPTIBLE INTEGER LENGTH LFLOAT LONGCOMPLEX LONGREAL MAX MIN NEW NIL ODD ORD PROC PROTECTION RE REAL SIZE TRUE TRUNC UNINTERRUPTIBLE VAL
The pervasive identifiers COMPLEX, CMPLX, IM, INT, INTERRUPTIBLE, LENGTH, LFLOAT, LONGCOMPLEX, LONGREAL, PROTECTION, RE and UNINTERRUPTIBLE were added for ISO Modula-2.
: colon seperates variable from type or case label from statements
, comma seperates items in lists
.. ellipsis range indicator
= equals constant or type declarations
. period decimal point, qualified identifier selector, end of program
; semicolon statement separator
( ) parentheses expressions, parameter lists or enumerations
[ ] brackets index, range, module priority, or absolute address brackets
(! !) brackets - alternate form
{ } braces set delimeters
(: :) braces - alternate form
| bar separates each varient in case statement
< > pragma source code directive indicator
(* *) comment contain comments
E (in a REAL) the exponent or scale factor
B(after a constant) an octal literal
H(after a constant) a hexadecimal literal
C(after an octal constant) the corresponding character literal
:= assignment operator + plus (identity) and set union operator, string concatenation symbol - minus, negation, and set difference operator OR logical disjunction operator * multiplication and set intersection operator / division operator and symmetric set difference operator DIV div operator MOD mod operator REM rem operator AND, & logical disjunction operator NOT, ~ logical negation operator = equals operator # <> not equals operator < less than operator > greater than operator <= less than or equal and subset operator >= greater than or equal and superset operator IN set membership operator ^,@ dereferencing operator (caret or hat)