ISO Pascal reference manual

PROGRAM fail;
VAR c:char;
BEGIN
c := ABS('x');
END.
*ERROR 108 -- SQR needs a real or integer type parameter
The function SQR returns the square of either integer or real values; no
other type of value may be given as the parameter.
PROGRAM fail(output);
BEGIN
writeln(sqr(FALSE));
END.
*ERROR 109 -- CHR needs an integer type parameter
Appendix A
The parameter given to CHR may only be of type integer or a subrange of
integer.
PROGRAM fail;
VAR c : char;
x : real;
BEGIN
x := 1;
c := CHR(x); lx isn't an integer}
END.
*ERROR 110 -- ODD needs an integer type parameter
The function ODD may only be given a parameter of type integer or a
subrange of integer.
PROGRAM fail(output);
VAR b : boolean;
BEGIN
IF ODD(b) THEN writeln('not even');
END.
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